Acute Effect - Adverse symptoms that develop rapidly (usually within 24 hours).
Acute Toxicity - Adverse effects that result from a single dose or a brief exposure to a substance.
Asphyxiant - A vapor or gas that can cause unconsciousness or death by suffocation (lack of oxygen).
āCā or Ceiling - The maximum allowable workplace concentration limit for an airborne substance. NOT TO BE EXCEEDED EVEN MOMENTARILY.
Carcinogen - A substance or agent that causes cancer.
Chronic Effect - Symptoms that develop slowly over a long period of time or which recur frequently.
Chronic Toxicity - Adverse effects resulting from repeated or prolonged exposure to a substance.
Combustible Material - Material that burns after being heated sufficiently; flashpoint above 100 degrees F.
Corrosive -A substance that causes chemical burns or destructively attacks body tissue.
Decomposition -Chemical breakdown of a substance.
Dermal - By or through the skin.
Flash Point - The lowest temperature at which a liquid will give off enough flammable vapors to ignite when exposed to a flame.
Flammable Material - A material that catches fire readily and burns rapidly; flash point of 100 degrees F or less.
Ingestion - Swallowing.
Irritant - Causing an inflammatory response or reaction of the eye, skin, or respiratory system at the site of contact.
LD50 - Lethal dose 50; the dose that will kill 50% of the test animals receiving that dose; a measure of acute toxicity.
Mutagen - Causes mutations in DNA and living cells.
Oxidizer - Any substance that releases oxygen readily; e.g., nitrates and peroxides. Oxidizers react readily with many organic substances.
PEL - Permissible exposure limit, an 8 hour TLV set by OSHA.
PH - Measures how acidic or caustic an aqueous liquid is on a scale of 1-14; pH=1 is very acidic, pH=7 indicates a neutral solution and pH14 indicates a very caustic (basic alkaline) solution.
MOLLY MAID Safety Manual
Page 57
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