Ops, Chemistry, Toxicology Flashcards Preview

NC HazMat 12/2017 > Ops, Chemistry, Toxicology > Flashcards

Flashcards in Ops, Chemistry, Toxicology Deck (40)
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31

Exposure

Amount of the substance which is available for absorption NOT the amount actually absorbed.

32

Dose

Amount actually absorbed.

33

Contamination

Occurs when the material clings to or saturates clothing or parts of your body.

34

Acute vs. Chronic

Acute- Exposure over short period of time to a relatively high concentration of a substance. May have effects that are both immediate and long-term.

Chronic- Long-term over several days to years and involve repeated periods of contact at relatively low concentrations.

35

Name 4 ways toxins enter your body?

Ingestion, Injection, Absorption, Inhalation

36

Name 4 types of effects that hazardous mixtures can have on your body.

Addition (2+2=4)

Synergism (2+2=6)

Potentiation (0+2=4)

Antagonism (2+2=0)

 

37

PEL - Permissible Exposure Limit

Legal limit in the United States for exposure of an employee to a chemical substance or physical agent and established by the OSHA.

For chemicals, the chemical regulation is usually expressed in parts per million (ppm), or sometimes in milligrams per cubic meter (mg/m3). 

A PEL is usually given as a time-weighted average (TWA), although some are short-term exposure limits (STEL) or ceiling limits.

38

TLV- Threshold Limit Value

Level to which a worker can be exposed day after day for a working lifetime without adverse effects. The TLV is an estimate based on the known toxicity in humans or animals of a given chemical substance. TLV are values established by a professional organization and are not law.

39

A chemical added to slow down or speed up a chemical reaction.

Catalyst

40

A substance that spontaneously ignites when exposed to air is considered?

Pyrophoric