Areas of Safety
Safety Documents and Materials Data Sheets
Personal Protective Equipment
Safety Best Practices
Call 911 or (402) 472-2222 from the nearest telephone
Medical Emergency - Dial 911 or 472-2222 from the nearest telephone
Alarms/Notifications (Fire, tornado, chemical spill)
Fire and/or Explosion
Fire Extinguisher Operation
Injury Accidents and Medical Emergencies
Required Accident/Injury Reporting
ALARMS/NOTIFICATIONS (FIRE, TORNADO, CHEMICAL SPILL)
Fire: Voice notification, sound, and flashing light. Exit the building as soon as you hear the alarm; fire or smoke can quickly block your escape routes.
- Experiments in progress: Turn off the power to equipment (solvent stills, heating mantles, etc.) if you can do so without delaying your departure more than a few seconds. After evacuating the building, if you realize that an unattended laboratory operation may pose a safety problem, inform the UNL Police, Lincoln Fire & Rescue, or a member of the Chemistry safety committee.
Close laboratory or office doors and head for the nearest stairs. If your first choice is blocked by fire or heavy smoke, try an alternate route.
- Elevators will not work during a fire. (If you are already on an elevator, it will descend to the first floor, and remain there).
Move away from the building. Assemble with your lab or office mates in the Sheldon parking lot. DO NOT reenter the building until an “all clear” is given.
- If you believe someone remains trapped in the building, notify a member of the UNL police or Lincoln Fire & Rescue (one or both will be near the building doors).
Tornado: Voice notification, flashing light.
STAY INSIDE. Go to the BASEMENT or to the NORTH hallway of a lower floor. The elevators WILL work, and may be used. STAY AWAY FROM WINDOWS. The tornado may shatter windows and create flying glass debris. Avoid the large lecture rooms. The City of Lincoln tornado alarm may sound before the campus tornado alarm. If you hear the city alarm, obey it -- seek shelter immediately.
Dangerous Chemical Spill: May be “Continuous Buzzer” or Fire Alarm.
Exit the building as rapidly as possible. If the spill or dangerous fumes block your path, retreat and try another stairwell. Note: The elevator will not work if someone has pulled the fire alarm as a way of altering the building.
UNL Alerts Message: If you receive a UNL Alert message, read it closely to see if you need to take action.
Sign up for UNL Alerts (http://emergency.unl.edu/unlalert), to receive text and e-mail alerts regarding active crime situations, gas leaks, floods, etc.
FIRE AND/OR EXPLOSION
A MAJOR fire or explosion includes:
- Any fire or explosion that generates toxic smoke or fumes or unknown hazards.
- Places you in any danger and/or threatens your safe retreat.
- Involves a large amount of flammable materials (for example, a large solvent fire or a fire that has already spread beyond a hood or a trash can). For a MAJOR fire, your primary duty is to sound the alarm and then get to safety!
- DO NOT waste time trying to use a fire extinguisher on a major fire.
- Close the doors to the lab in order to contain blaze or chemical fumes.
- Actuate a fire alarm (red pull station found near each corner stairwell on floors 2-8). If you cannot do this without being in danger, go to another floor or call the emergency operator (next section) once you are clear.
- If you can do so safely, inform the emergency operator of the location and nature of the fire (any special hazards you know of?), and whether anyone has been injured. Use:
- The Red phone in the hallway;
- 911 or 402-472-2222 from your cell;
- 2-2222 or 9-911 or 0 from any campus phone.
- Exit the building. Gather with others from your lab or office in the Sheldon parking lot.
A SMALL fire or explosion is one where
- You are in no immediate danger and no one is injured.
- You are not alone, and you have a clear path of retreat in case things get worse.
- The fire is contained to a small area (a hood, a trash can) and you are confident you can extinguish the fire with the contents of a single fire extinguisher.
- If a small fire gets out of control or begins to scare you, back away and follow the procedures described above for a major fire.
If someone is one fire, extinguish the flames using a safety shower and then call for help using 911, 402-472-2222 (2-2222 from lab/office phones), or the Red phones in the hallway. Consult the section on "Injuries" for more details.
A MAJOR spill involves:
- Any spill that puts you in danger;
- Any spill of flammable, toxic, or corrosive liquids or gases, or materials of unknown toxicity, in poorly ventilated and high traffic spaces such as an elevator, stairwell, or classroom
- Any spill of a volatile and toxic material that could produce death or serious injury upon short exposure (an example would be anything a GHS rating of "1" for inhalation toxicity or toxicity through dermal absorption.
- Any spill involving large amounts (for example, > 4L) of flammable solvents or highly corrosive materials;
For a MAJOR spill, retreat to a safe distance, sound the alarm, and then help protect others:
- Yell for help to alert others nearby and to get assistance.
- Pull the fire alarm located near any of the corners of Hamilton Hall. If this location is not safe, one of you should go to another floor or call 911 from outside.
- Use a Red phone in the hallway, your cell phone (911 or 402-472-2222), or an office phone (0 or 2-2222) to inform the emergency operator of the location of the spill, whether anyone has been injured, and what you know about the chemical.
- Ask someone to print off an SDS (Safety Data Sheet) for the spilled chemical; emergency responders will find this helpful.
- If you can do so safely, guard the hallway or use chairs or trash cans or can find to prevent others from accidently being exposed. Make sure you are at a safe distance. If you can do so safely, stay nearby (for example, near the elevator or in the lobby on the 1st floor, to advise the Safety Committee members or emergency responders. However, if fumes or smoke are placing you in danger, you need to leave.
Chemical exposure/chemical burn: Time is critical. REMOVE the chemical immediately using a safety shower. Take off your lab coat and step under the shower. Remove contaminated clothes while the shower is running. Keep using the shower until you are confident the chemical has been removed. (A lab coat can be used as a cover up until dry clothes can be arranged).
- For a splash to the eyes, use an eye wash; for exposure to hands or arms, use the sink.
- If you have been exposed to a water-reactive material such as lithium aluminum hydride powder or suspension, and it has not caught on fire; take off your lab coat or outer clothing before stepping under the shower.
MINOR Chemical Spills
You can clean up spills yourself when:
- You are familiar with the spilled material and are sure that you are not in danger.
- The spill occurs in a well-ventilated area;
- You are not alone;
- You have access to an adequate spill kit. Appropriate absorbent materials or commercial spill kits are available. See http://ehs.unl.edu/sop/s-preplan_respond_spills.pdf
- Wear appropriate gloves (check glove compatibility), a lab coat, and eye protection;
- Build a “dam” of absorbent powder or adsorbent spill pads so that the spilled chemical does not “run” under cabinets or inaccessible spots. Add additional absorbent to soak up the bulk of the spilled chemical. Do not clean up spills with paper or cloth towels unless you know that he material is nontoxic and that the gloves you are using will resist penetration.
- Use a brush and dustpan to transfer the absorbent into dustpan into a zip-loc bag (small amounts) or a plastic bucket (larger amounts). Place the bag or bucket, along with any cloths or paper in a fume hood (exhaust cabinet) and call EHS (2-4925 or 402-472-4925) to arrange disposal.
Special case: Mercury
Minimize use of mercury. If mercury must be used, you must use secondary containment (for example, a plastic catch basin under a mercury manometer). If mercury is spilled:
- Block off the area with chairs, waste cans or other objects so that others do not track through the area and spread the mercury further.
- Contact EH&S (2-4925). They will come over and use specialized equipment to remove all mercury.
- Broken mercury-containing apparatus should be placed in a zip-loc bag for pickup by EH&S. Alcohol thermometers or digital thermometers should be used to replace mercury thermometers whenever possible. Similarly, use of mercury in manometers or bubblers should be minimized. If significant quantities of mercury must be used (bubbler, manometer), the mercury-containing device must be in a secondary container (for example, a plastic tub) capable of capturing mercury in the event of breakage.
INJURY ACCIDENTS OR MEDICAL EMERGENCIES
LIFE THREATENING EMERGENCY, AFTER HOURS, WEEKENDS AND HOLIDAYS
Apply First Aid. Yell for help. Call 911 or 472-2222 (on a campus phone) or use the red phones located at the center of the north/south hallway” on most floors of Hamilton Hall. Tell the operator that you are reporting an injury emergency. Give your location (Hamilton Hall, room number or floor) before trying to go into more detail.
Stay on the phone until the operator has the information they need. If you are asked about an address, you can give 639 North 12th Street, Lincoln, NE
- For a chemical exposure, continue rinsing the exposed area until emergency response arrives. Ask someone to help in printing off a safety data sheet for the chemical.
- If there is risk of exposure to blood or bodily fluids, see if there are any disposable gloves nearby (usually are in most labs).
- Ask the injured person if there is anyone else who should be notified (spouse, etc.).
- If possible, have someone go down to the lobby to meet emergency responders and help guide them to the location of the injured person.
Overview of Procedures
Injuries: Definition and Suggested Response
Cuts, burns, or bruises that do not present a serious health risk;
- Typically treatable with routine first aid supplies
- Stop bleeding with compression or a bandage.
- In the case of minor chemical exposure, rinse affected area thoroughly.
- Burns: hold under cool/cold water for several minutes.
- Must be reported (section 4: Required Injury Reporting)
- First aid kits
- Injury SOP
Seek medical attention if the bleeding will not stop or if the injury appears to worsen. Someone should accompany the injured person for any trip to the Health Center or an off-site clinic.
Require nonemergency treatment or evaluation by a medical professional. At least one person (two is better) should accompany the injured person for medical treatment.
- Foreign object or any chemical in the eye;
- Inhalation of a chemical carrying a 1 or 2 GHS Hazard rating or any inhalation exposure that results in trouble breathing.
- Second degree burns (burns, blisters, some thickening of skin) that involve a widespread area of the body, particularly face, hands, groin, or feet.
- Any third-degree burns (described below) unless limited to a very small area like a finger-tip.
- Any bleeding that does not stop within 5 minutes even after compression or bandaging.
- Any bleeding that does not stop within 5 minutes even after compression or bandaging.
- Any accidental ingestion or aspiration of a chemical carrying any GHS warning for ingestion or aspiration toxicity.
- Apply first aid as for a minor injury.
- Someone (two is better) should assist the injured person to a medical facility (see "Where to go"). For chemical exposure, be sure to take along a Safety Data Sheet (MSDS or SDS).
- Injury SOP
Prompt action is required to prevent loss of life or permanent injury.
- Major bleeding (for example, "arterial" bleeding -blood spurts);
- Third degree burns (skin is black, brown, yellow or white; surface may look leathery; no pain may be felt because of nerve damage);
- Seizures; symptoms of stroke; symptoms of heart attack;
- Any loss of consciousness;
- Difficulty in breathing,
- Yell for help-you will need others.
- Call 911 or 2-2222 (campus phone) or use the red phones located at the center of the north/south hallway” on most floors of Hamilton Hall.
- Tell the operator that you are reporting an injury emergency. Give your location (Hamilton Hall, room number or floor) before trying to go into more detail. Stay on the phone until the operator has the information they need. If you are asked about an address, use 639 North 12th Street, Lincoln, NE.
- Apply first aid:
- If there is risk of exposure to blood or bodily fluids, put on disposable gloves and safety glasses.
- For a chemical exposure, continue rinsing the exposed area until emergency response arrives.
- Ask someone to help in printing off a safety data sheet for the chemical.
- While the injured person is conscious, ask them if there is anyone who should be notified.
- Send someone to the 1st floor to help guide emergency responders.
Where to go for treatment
Hospital Emergency RoomsCall 911 or 402-472-2222 for emergency service
General: (402) 489-0200
General: (402) 481-1111
General: (402) 219-8000
Student injuries that are minor or moderate can be seen during the day (M-Thu 8-6, Fridays 8-5; Saturdays 8-noon) at the University Health Center (1500 "U" Street, 402-472-5000). It is helpful, but not required, to have someone call while the person is in transit, especially if it is a chemical exposure.
Fri: 8 a.m.-5 p.m.
Sat: 9 a.m.-noon
24 hr service 4 p.m. Fri until 8 a.m. Mon.
If the Health Center is closed (for example, late afternoon lab), you do not need to seek preauthorization; go directly to an emergency room (above) or a clinic (listed below).
Employees, students on payroll, visiting scientists, and students (after hours)
UNL employees (includes graduate research assistants, undergraduates performing research as hourly employees, and UCARE) may seek medical attention from their personal physician or at a medical facility of their choice. Following is a list of some nearby medical facilities. Use of emergency rooms should be reserved for after-hours care and severe injuries or illnesses. Injured employees should bring their employee ID card. Students who are not conducting work for compensation by UNL at the time of their injury/illness should seek medical treatment at the University Health Center or their own private physician if this is feasible but may seek treatment at an emergency room or clinic for injuries after normal Health Center hours. (from http://ehs.unl.edu/sop/s-injury.pdf)
Urgent Care Clinics (walk-up appointments)
Sun: 12 p.m.-9 p.m.
South: 3910 Village Drive
South: (402) 434-7383
Sat/Sun 10 a.m.-4 p.m.
3740 N 27th (N of Cornhusker Highway)
N 27th: (402) 423-0396
M-F 7 a.m.-5 p.m.
TURN OFF THE WATER. To arrange for clean up, call the Building Manager, Dodie Eveleth: (402) 472-5312 or firstname.lastname@example.org; if the emergency occurs after hours, dial the operator “0” or 402-472-2222. Prevention is the watchword:
- Turn off water lines that are not in use.
- Always secure hoses onto fittings. A number of vendors sell small “tubing clamps” that will prevent tubing from slipping off of hose adapters.
- Secure drain hoses. A simple and useful technique is to secure tubing with a three-finger clamp so that it does not “leap out” of the drain and cause a flood.
INTRUDER IN THE BUILDING
The department has suffered considerable losses due to theft, and there is always a danger of physical harm from unauthorized personnel present after normal hours. If you notice a suspicious person in the hallways of Hamilton Hall, do not hesitate to call the Campus Police. In the hallways, all you have to do is lift the red emergency telephone. You do not have to say anything. The police will come to investigate. Other telephones can also be used, if you prefer (dial 2-2222 (“dial 2 for blue”)); be prepared to tell the operator why you called.
REQUIRED ACCIDENT/INJURY REPORTING
You must alert the safety committee chair about any accident/incident: Pat Dussault, (email@example.com). Your message should indicate:
- The time and location of the incident and the identity of the injured person.
- The nature of the injury and a description of any first aid administered.
- A description of any medical response was involved -clinic vs. emergency room; was the individual transported by ambulance or personal vehicle? Did the injury require a hospital stay?
In the case of a student injury in a classroom or teaching lab, you must also complete the Student Injury/Illness reporter: https://scsapps.unl.edu/studentinjuryillnessReporter/
If you were treated at the Univ. Health Center or any clinic for a work-related injury, it is likely that you filled out "Workman's Compensation" forms related to workplace injuries. These forms will automatically be forwarded to UNL EHS.
We work actively to learn from incidents and your report may help prevent future accidents and injuries. Even if the accident results in only minor injury (or no injury at all), we ask you to report it to the Safety Chair and the EHS "Near Miss" website: https://scsapps.unl.edu/EHSNearMissReporter/.
Required Safety Training - UNL Department of Chemistry
Anyone working or conducting research in Hamilton Hall (including faculty, postdoctoral researchers, staff, graduate students, undergraduate researchers, interns/volunteers, or visiting researchers) must complete the appropriate university safety/injury prevention training (described in section A) and departmental safety training (described in section B). These requirements do not apply to students whose only chemistry-related activity is through an undergraduate teaching lab (e.g., CHEM 109, 110, 221, 253, etc.). For questions about any other possible exclusions, contact the Safety Chair (Prof. Pat Dussault, firstname.lastname@example.org).
Most individuals will need to complete A1-A5 and B unless they have attended an in-person EHS training session covering the same material. A shorter training set may be possible for individuals whose research or work is not expected to result in ANY exposure to hazardous materials. Contact Prof. Dussault if you believe this describes your situation.
A. UNL Safety Training (through Env. Health and Safety, http://ehs.unl.edu/onlinetraining/).
Note: In order to be registered for online courses provided through this website you must provide your NU ID number. If you have not yet been issued an NU ID you may take the course, but your session will not be recorded; it will be your responsibility to print out your receipt(s) of successful module completion. Sessions will not be recorded until an NU ID number is provided to Environmental Health & Safety (EHS) by phone (402-472-4925) or email (email@example.com).
At some times of the year, you may have the option of attending an in-person training session to replace some or all of the modules below.
#1: Core -Injury and Illness Prevention Plan (IIPP). Must be completed (once) by anyone employed and/or conducting research in Hamilton Hall. The Injury and Illness Prevention Plan module is required for all employees who get a paycheck from UNL. There is a quiz following this module. You must pass with an 80% score to complete the module successfully. This module requires approximately 45 minutes to complete. You will need to provide your NU ID number to register.
#2: Core -Emergency Preparedness Training. Must be completed (once) by anyone employed and/or conducting research in Hamilton Hall. It is recommended that you complete this Emergency Preparedness module AFTER you have taken the Core-Injury Illness and Prevention Plan (IIPP) training module. There is a quiz following this module. You must pass with an 80% score to complete the module UNL Chemistry required Safety/Hazardous Materials training updated October 2013 successfully. This module requires approximately 45 minutes to complete. You will need to provide your NU ID number to register.
#3: Chemical Safety Training (four individual units). Unit 1: OSHA Standards, Safety Data Sheets, Labels, and Door Postings Unit 2: Physical Hazards of Chemicals Unit 3: Health Hazards of Chemicals Unit 4: Hazard Mitigation Must be completed once by anyone whose work or research may bring them into contact with hazardous chemicals; this includes most personnel in Hamilton Hall. Note: Units 1-4 replace the Chemical Safety training used through July 2012. If you completed Chemical Safety training before August 2012 AND will graduate or leave by May 2013, you do not need to retake the new training. IF you will likely be in Hamilton after May 2013, then you MUST take the new training to remain in compliance. This module consists of four units. ALL FOUR UNITS must be successfully completed to meet the requirement. There is a quiz following each unit. You must pass all four unit quizzes with an 80% score to complete this training module successfully. If your score is less than 80% on any unit, your registration will not be recorded for that unit. Each unit requires approximately 30 minutes to complete.
#4: Fire Extinguisher Training. Required once for employees who may opt to use a fire extinguisher. The "Core-Emergency Preparedness" training (#2, above) is a pre-requisite to this course. This course may be taken as a stand-alone unit or as the first part of a two-part training session. Once you have completed the web-based training portion, you may participate in a supplementary hands-on training session. Contact Environmental Health & Safety for more information at (402) 472-4925 or firstname.lastname@example.org. This training may be replaced by an instructor-led session. There is a quiz following the module. You must pass with an 80% score to complete the module successfully. If your score is less than 80% your registration will not be recorded. You need to review the material and re-take the quiz until you pass in order for your session to be recorded. This module requires approximately 30 minutes to complete. UNL Chemistry required Safety/Hazardous Materials training updated October 2013
#5: Personal Protective Equipment (PPE). Must be completed once by anyone whose work or research may require use of PPE (for example, gloves, goggles). Most personnel in Hamilton Hall will need to take this training. This training may be replaced by an instructor-led session. This training provides general instruction regarding assessment of hazards, selection of PPE, and appropriate use of PPE This training is appropriate for persons who are responsible to select and provide PPE to employees, as well as employees who are required to wear PPE. This training does not cover PPE related to blood borne pathogens and biological agents. There is a quiz following this module. You must pass with an 80% score to complete the module successfully. If your score is less than 80% your registration will not be recorded. You need to review the material and re-take the quiz until you pass in order for your session to be recorded.
B. Department of Chemistry Safety Training
After you have completed the UNL online modules described above, you must also complete Department of Chemistry Safety Training. Chemistry’s safety training is designed to reinforce and supplement the EHS training described above, and must be completed within two weeks of joining the department or beginning research.
- Departmental safety training sessions are typically offered in May, June, July, August and may be offered in September and January. Contact the Chair of the Safety Committee, Prof. Pat Dussault (email@example.com) for more information.
If no training session will be available before you begin work or research, you may need to complete the internal training requirement individually. Review the PowerPoint used as the basis for Chemistry’s training session; this PowerPoint is required for all graduate students and anyone whose research or work might involve work with hazardous materials.
- Staff and researchers whose work or research will not involve any exposure to hazardous materials (for example, staff and student workers, in offices; researchers other than graduate students in Francisco, Li, Zeng, and M. Stains labs) are encouraged to study an alternate PowerPoint focused on nonchemical hazards. Note that this alternate option is not open to any graduate students without special permission from the Safety Chair, Pat Dussault.
Safety Documents and Materials Data Sheets
Materials Safety Data Sheets
List of Hazardous Chemicals
More General Health and Safety Resources
Personal Protective Equipment
You must, by law, wear approved safety glasses or goggles at all times you are in the lab. A State of Nebraska legal statute requires this action. Areas with student desks, or where safety glasses would be unnecessary, can be exempted by vote of the safety committee, upon an application by the director of the laboratory. If a section of a laboratory, rather than the whole laboratory, is to be exempted, the exempted area must be marked off with floor tape. A face shield should be used in addition to safety glasses or goggles for experiments where there is a chance of explosion or violent chemical reaction. The use of high power lasers requires special didymium eye goggle protection. Consult the professor in charge of the laser installation. Appropriate goggles should be at hand at the entrance to each laser facility. The laser facility should be equipped with signs on the lab doorway notifying persons seeking to enter the facility that a high power laser is (or is not) in immediate use. Goggles should be donned before you enter the facility. Reflection from an unprotected surface is a serious problem. Thus, most laser facilities have walls painted with flat black paint. Hanging strips of dark cloth are also used to further reduce the danger of reflections. The operation of photochemical reactors requires the use of specialized didymium UV protective goggles. Like lasers, high power UV reactors give light that is extremely unpleasant and dangerous to the eyes after only a brief exposure. The reactor should be shielded so that the intense light does not emanate. Doorways should be posted with notices, if the reactor is in use. Thus, goggles must always be in place, BEFORE you enter the facility. If you suffer a splash of chemical in your eye, use the yellow eye wash fountains immediately. The eye wash fountain installation should not be blocked by equipment. If you get a chemical in your eye, run a little water through the fountain to clear the line, before you pass water over your eyes. It is especially important to hold open your eyelids so that the stream of water is able to rinse the chemical from the eye surface. The natural human reaction is to squint the eyes because of pain associated with the chemical and also the additional pain due to the cold water. However, it does no good to pass the stream of water over eyes squinted shut. So hold open the eyelids and pass the water over the eyeballs intermittently, allowing time to recuperate between eyeball rinses. Experts indicate that a 15 minute rinsing is required, painful though this may be. If the pain is intolerable, use intermittent rinses. An eyewash hose is located at the doorway to some of the older labs. This device is easily located, even though you may be temporarily blinded by the chemical in your eye. Some water should be passed through the hose before the stream is passed over your eye. Do not worry about water on the floor. Eye wash fountains and eyewash hoses must be flushed once per week so that sediment does not build up in the line. Monday mornings are recommended.
For Students: In the event students get something in their eye, always take them to the Health Center after you finish rinsing the eyes. Somebody should accompany them.
For Faculty or Staff: In the event faculty or staff get something in their eye, they should be taken to a walk-in clinic or Emergency room. The Chemistry Lab Manager is ready to assist the injured with transportation to this care site. An alternative site is the emergency room of hospitals. The closest available hospital is Bryan West, 2300 S 16th St, Lincoln.
Hand protection is necessary when using certain corrosive or allergenic chemicals, or in removing glassware from an oven. Working with cryogenic materials requires special gloves to avoid frostbite and tissue damage. Leather gloves are recommended if there is explosion danger. A variety of protective gloves are available through most major scientific suppliers. Latex gloves are not recommended due to allergy problems of a cumulative nature. Also, they are permeable (not impervious) to organic chemicals of certain types. No one type of glove is resistant to all chemicals. “Silver Shield” brand gloves are perhaps the best compromise. “Vinyl” or “nitrile” gloves are made available to undergraduate students in laboratory courses. TA’s should make sure students do not use gloves that become torn. Nitrile gloves are "single use" PPE. They must be discarded, when removed from the hands, and NOT reused. In the course of chemical research, gloves should be changed frequently, if the research involves contaminants, as is the usual case. Whichever type of glove is used, they must be removed before the researcher leaves the research lab. Gloves must be removed before common use items, such as telephones, are used. Researchers should wash hands upon removing gloves.
According to current safety rules, respirators may only be used by persons who have had appropriate health testing and fit testing of the respirator. Contact EH&S for more information (2-4925).
Laboratory Attire: Lab Coats and Aprons
- Lab coats must be worn by personnel engaged in research using chemicals. The use of lab aprons is also encouraged. Two types of lab coats are approved for use in Hamilton Hall. Lab coats made of fire-retardant-treated cotton are acceptable for most uses; however, when using pyrophoric compounds, special aramide coats must be worn. Wearing of polyester or other highly flammable material in the laboratory is discouraged.
- Open-toed shoes are forbidden in laboratories, i.e. NO sandals or thongs.
- Dangling jewelry and billowy sleeves are not appropriate for laboratory.
- Long hair should be secured if there is likelihood that the hair might encounter chemicals. TA’s in undergraduate laboratories should be careful to enforce this rule.
Hoods & Explosion Shields
- Experienced chemists do most of their work in a fume hood.
- If danger of an explosion exists; close the doors of the hood or the hood sash. This will contain the explosion. The hood doors/sash are not totally explosion resistant.
- In extreme cases of explosion danger, researchers should use an “explosion shield” in addition to closure of the hood doors.
- In extreme cases, investigate the use of the “High Hazard Lab” on the 9th floor.
- Not sure? Get advice from older more experienced grad students, or from your research director.
- “Prudent Practices” (an ACS publication) should be consulted (Chem Library, reference section).
Safety Best Practices
Minimizing chemical odors/vapors in Hamilton Hall
On several recent occasions, a strong odor of chemical reagents or solvents has been detected in a location remote from any obvious generation point. The “vector” is almost certainly drain water. The Safety Committee requests use of the following procedures as a way of avoiding/minimizing this problem.
- Most solvents cannot be placed into the drain. The exception is ethanol, and then only for dilute solutions (see http://ehs.unl.edu/sop/s-sewerdisp.pdf).
- When conducting large-scale liquid/liquid extractions, do not directly discharge the aqueous phase into a drain. This is particularly important when dealing with solvents (for example, ether or dichloromethane) that are slightly soluble in water and that have a strong odor. We recommend the following practices for extractions:
- Allow the aqueous wash to stand for a few minutes in a beaker or dish (preferably in a fume hood) before disposal;
- Alternatively, do a final extraction of the aqueous layer(s) with a small volume of a water-immiscible solvent such as hexane.
- Organic extracts are often dried with sodium sulfate (Na2SO4), magnesium sulfate (MgSO4), or molecular sieves. Sodium sulfate and magnesium sulfate can, in principle, be disposed of in the sink but only after removal of all residual solvent. A better practice is to gather a particular class of used drying agent (e.g. sodium sulfate) in a well-labeled flask or bottle in a fume hood. Contact EHS re disposal once the flask is full.
- When possible, use Teflon-vaned vacuum pumps (“Dry vacs”) as vacuum sources for evaporators (including rotary evaporators and “speed vacs”) and for any filtrations involving volatile organic solvents. If you are using water aspirators as vacuum sources for these applications, you must use an efficient condenser.
When you find yourself on the receiving end of odors: If you have a sink or cup sink in your lab or office area, try to run a small amount of water (15-30 sec from the tap) on a weekly basis. This will keep the drain trap filled, and will minimize escape of any odors from the drain. If you begin to detect chemical odors, try to run some water into the sink. If the problem persists, call the Building Manager (2-5312) or the Safety Chair (below) and we will try to track down the source.
Questions? Contact Pat Dussault, Safety Chair, at firstname.lastname@example.org or 2-6951
Fire Extinguisher Operation
- Locate the "KEY" (the round object)
- Twist the "KEY" to break the stiff Nylon retaining cord
- Then pull "KEY" out
- Do not merely attempt to pull the key straight out, unless you are very strong.
- Raise the nozzle in order to direct the stream of carbon dioxide
- The CO2 will cool the fire, and restrict oxygen
- The fire, lacking oxygen, should go out.
- Squeeze the handle to begin operation. Aim at the base of the fire.
- There are two main types of fire extinguishers
- carbon dioxide
- dry chemical (powder)
- Often, but not always, they carry different colors.
- In this case the carbon dioxide extinguisher is red, and the dry-chemical (powder) extinguisher is yellow.
- Read the tag to know which you will use. The tag also should show the date the extinguisher was last serviced.
- Carbon dioxide extinguishers are good, general purpose extinguishers.
- Dry-chemical (powder) are used for difficult cases, say certain types of electrical fires.
- AVOID using a dry-chemical extinguisher on a fellow human being.
- The powder may get in the victim’s eye and cause irritation.