Biochemistry Flashcards
What is WHMIS?
WHMIS is an acronym that stands for Workplace Hazardous Materials Information System.
What is WHMIS legislation states ?
It States that workers must be informed about the hazards of working with dangerous chemicals, and they must be given training on how to use the chemicals safely. That is why warning labels appear on the containers of hazardous products. It is also the reason that workers who use the chemicals must take special safety courses.
There are eight standard symbols that have been designed to advise workers that they must be careful when handling certain materials, what are the symbols relate to?
The symbols relate to safety concerns about flammability, reactivity, and health.The symbols relate to safety concerns about flammability, reactivity, and health.
WHMIS defines its hazardous product symbols as follows:
- Compressed gas is under extreme pressure and is stored in a cylindrical container. If the container ruptures, there is a danger of it exploding or becoming a projectile object. Oxygen and acetylene are examples of compressed gases stored in these containers.
- Flammable and combustible materials ignite easily and continue to burn once ignited. Gasoline and alcohol are examples of flammable and combustible substances.
- An oxidizing material does not necessarily burn on its own, but it is a source of oxygen for combustible material. As well as supporting burning, the presence of these materials can lead to spontaneous combustion or explosive reactions. Ozone and nitrogen dioxide are oxidizing gases.
- Poisonous and infectious materials are classified as substances that have immediate and serious toxic effects. Cyanide is an extremely toxic substance.
- Poisonous and infectious materials causing other toxic effects include substances that have long-term effects, such as carcinogens. For example, prolonged exposure to asbestos could cause lung cancer.
- Biohazardous infectious materials include organisms or toxins produced by organisms that cause certain diseases. Hepatitis B is caused by a virus and affects the liver.
- Exposure to corrosive material, such as battery acid or strong household cleaners, may cause skin irritation and burns.
- Dangerously reactive materials are unstable and may undergo extremely violent reactions. They can cause explosions and fires. Sodium metal reacts violently in water, producing hydrogen gas and heat. The heat may ignite the hydrogen and cause an explosion.
In Canada, all chemicals must have —————————————————-attached to their containers. The MSDS identifies the ————and its ————- properties, as well as any dangers the chemical may present to a person handling it.
- A Material Safety Data Sheet (MSDS)
- Chemical
- Physical
MSDS gives the ————-, —————-, and ———– of the material, as well as first-aid, spill, and cleanup procedures. The MSDS also lists ————combinations that should be avoided.
- melting point
- boiling point
- toxicity
- chemical
Many common household products have hazard symbols printed on their containers. These symbols are enclosed in the following specific shapes:
- A triangle stands for ————-
A diamond stands for————.
An octagon stands for ———–.
- Caution
- Warning
- Danger
The MSDS gives a detailed description of the —————————-, ——————appearance, and ———————-features of the product. The MSDS also explains the ————————a user should take while handling, storing, transporting, or disposing of that product, and it explains what steps to take in case the product is ——————-.
- composition
- physical
- chemical
- precautions
- mishandled
It is very important to transport, store, and dispose of hazardous chemicals properly. Laboratories and work sites all over the world are required to maintain current Material Safety Data Sheets (MSDS) for all hazardous products that they have on site.
- True
- False
True
In order for these guidelines to work, chemicals need to be stored in the following manners ?
- Keep oxidizers (such as H2O2) away from flammables
- Do not store flammable liquids in glass containers
- Return chemicals to their proper locations after use
- Keep chemical containers upright so they do not spill
- Discard hazardous chemicals safely if they have expired
- Keep hazardous products out of the reach of children and pets
- Keep products in their original containers with their original labels
- Store corrosive, flammable, reactive, and poisonous chemicals separately
- Place rusted or leaking containers in another container, and dispose of them together
When chemicals need to be disposed of, they must still be handled with care. Do not ——— chemicals before disposing, as they may react and create an explosion or a————— gas.
- mix
- poisonous
Leave the chemicals in their original containers if possible, and leave the labels on the containers. Hazardous chemicals should never be poured down the drain, into sewers, or into the soil.
- True
- False
True
Do not throw ————- in the garbage.
chemical
Hazardous waste collection sites are located in various locations. These sites are equipped to dispose of wastes such as paints and fertilizers. Materials that cannot be recycled are labelled and taken to incineration plants.
- True
- False
True
Governments have set up different policies and programs that deal with handling dangerous substances.
- True
- False
True
