While working in the laboratory, you may encounter
cuts, burns, injuries caused by chemicals skin, eyes), or poisoning caused by
inhaling poisonous vapors or swallowing poisonous substances.
There is always a risk of fires, explosions and electric
shocks. In order to avoid all these
dangers in the laboratory, you need to respect the safety
measures. It is also important that you react in time to help yourself and
others.
DO NOT CAUSE PANIC – This is the very first step in
providing first aid
CUTS are usually found on hands, and are mostly
caused by glassware. Verify if there is a shred of glass, metal or other
material in the wound. Use sterile tweezers to pull it out, cover the injury
with a piece of sterile gauze or bandage, and apply pressure to stop the
bleeding. In case of profuse bleeding, apply a compression bandage and seek
medical help.
BURNS are usually found on hands too, and are mostly
caused by handling hot objects or hot reagents. If there is no significant
damage to the skin, cool the burned spot with cold water (or ice placed on a
sterile cover). In case the clothing has become stuck to the skin and blisters
have formed, use a piece of sterile gauze to cover the burn and immediately
seek medical help.
CHEMICAL INJURIES TO SKIN
If a chemical has come in contact with your skin, rinse the
spot with running water and neutralize if necessary (acids should be
neutralized with saturated solution of sodium bicarbonate and alkaline with a
2% solution of acetic acid). In case of more severe skin damage, cover the spot
with a piece of sterile gauze and seek medical help.
In case your eye(s) come in contact with any kind of
chemical, wash it (them) with running water (for at least 15 minutes) and seek
medical help.
POISONING CAUSED BY INHALING POISONOUS VAPOURS
The affected person has to be carried out, where he or she
can inhale fresh air. Remove the affected clothing and seek medical help if
necessary. If the person has lost consciousness, position him or her on his or
her side, and immediately seek medical help. If necessary, apply the CPR
technique.
POISONING CAUSED BY SWALLOWING CHEMICALS
The stomach contents have to be diluted with large
quantities of water (or water with activated carbon). If you know the
composition of the substance swallowed, you can induce vomiting. You are not
allowed to do this in case the person has swallowed concentrated acid or
alkali. In that case the person should drink large quantities of water and seek
medical help.
INJURIES CAUSED BY ELECTRIC SHOCKS
Electric shocks can be caused by faulty wiring. Shut off the
source of electric power using insulated equipment. Remove the affected person
from the electric circuit and if necessary, apply the CPR technique. Seek
medical help.
FIRES AND EXPLOSIONS
The most frequent causes of fires and explosions in the
laboratory are the following:
- Faulty gas fittings
- Mishandling of easily
flammable substances (white phosphorus, etc.)
- Open-flame heating of
easily flammable solvents
- Incorrectly assembled and
connected equipment
- Inadequate control of the
chemical reaction (too high temperature, or pressure, too rapid addition of the
reagents, etc.)
- Working with compressed
gases and explosive mixtures
In order to extinguish a fire, use sand, fire blankets, fire
extinguishers or water, (when it is safe to use it). Small laboratory fires can
be extinguished by applying wet towels or sand, while larger ones are
extinguished by using fire extinguishers.
Everyone working in the laboratory has to be
instructed on how to use a fire extinguisher (water-based, sand-based, dry
chemical-based extinguishers and CO2-based fire extinguishers).
How to
Use a Fire Extinguisher
Even though extinguishers come in a number of shapes and sizes, they all operate in a similar manner. Here's an easy acronym for fire extinguisher use:
P
A
S S - Pull,
Aim, Squeeze, and Sweep
Pull
the pin at the top of the extinguisher that keeps the handle from being accidentally
pressed.
Aim
the nozzle toward the base of the fire.
Stand approximately 8 feet away from the fire and squeeze the handle in short intervals
to discharge the extinguisher.
Sweep
the nozzle back and forth at the base of the fire. After the fire appears to be
out, watch it carefully since it may re-ignite!
Source: