Chapter 23

Question 1

Hazardous
Chemicals

Answer 1

any chemical that can cause a physical or a health hazard

Question 2

A chemical is considered
hazardous if it:

Answer 2

Can ignite (catch fire)
Can react or explode when
mixed with other substances
Is corrosive
Is toxic

Question 3

Three primary methods of exposure

Answer 3

Inhalation
Skin contact
Ingestion

Question 4

Acute chemical toxicity:

Answer 4

Results from a high level of
exposure over a short period( ex chemical spill)

Question 5

Chronic chemical toxicity:

Answer 5

Results from many repeated exposures, generally to lower levels, over a much longer time—months or even years

Question 6

Mercury Spill Kit

Answer 6

Should be available in all dental offices in which
amalgam is used

Question 7

Mercury can be absorbed

Answer 7

through the skin or
through the inhalation of mercury vapors

Question 8

store dental
medications and chemicals

Answer 8

in a dry, cool, dark place where they are not exposed to direct sunlight

Question 9

Ignitable waste

Answer 9

Flammable or combustible

Question 10

Corrosive waste

Answer 10

Either highly acidic or basic with a pH less than 2.0 or greater than 12.5, respectively (water has a pH of 7.0)

Question 11

Reactive waste

Answer 11

Chemically unstable or explosive, reacts violently with water, or is capable of giving off
toxic fumes when mixed with water

Question 12

Toxic waste

Answer 12

Contains arsenic, barium, chromium, mercury, lead, silver, or certain pesticides