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CNESSTSanté et sécurité du travailEnglishPreventionRépertoire toxicologiqueWHMIS 1988Material Safety Data Sheet User's Guide6. Hazardous ingredients
This section of the MSDS includes the following :
The chemical name and ingredient concentration of products :
The concentration is defined as being the amount of a component in the total amount of the mixture. It can be expressed as a percentage (%) and interpreted as being a ratio:
The CAS number is assigned by the Chemical Abstracts Service, a division of the American Chemical Society, to precisely identify a chemical substance.
This is the amount of a substance that causes the death of 50% of the laboratory animals exposed to it orally (ingestion) or cutaneously. There are other routes of entry (for example by injection), but WHMIS does not take them into account.
This is the concentration of a substance in the air that causes the death of 50% of the laboratory animals exposed to it by inhalation, generally for 4 hours.