Burns, blisters, and destruction of skin tissue can result from contact with class _____
chemicals. (Select one.)
For additional information regarding the classification, handling, safeguard and antidote for
poisonous chemicals, read the following ENRICHMENT MATERIAL.
Classification of Dangerous Chemicals
All chemicals should be considered potentially hazardous. Some of the most dangerous chemicals are
listed as Classes 1, 2, 3, and 4.
Class 1--Chemicals listed as class 1 are extremely dangerous and should NOT be used in the photo lab.
Methanol (methyl or wood alcohol) is a class 1 chemical. If taken internally, methanol can cause
blindness, paralysis, or death.
Class 2--These chemicals are corrosives. Class 2 chemicals are strong acids and caustic chemicals which
will burn, blister, and destroy skin tissue. The following are examples of class 2 chemicals:
a. Glacial acetic acid--One of the most dangerous chemicals commonly used in the photo lab.
b. Formaldehyde, 37% solution (Formalin) --Vapors from formaldehyde are irritating to the
nose, throat, and chest areas. Severe eye damage can result from splashing and vapors.
c. Bromine--Exposure to 15 parts per million (ppm) causes throat irritation. Concentration of
1,000 ppm for a few minutes is fatal.
d. Sulfuric acid--A strong oxidizing agent, which can destroy the skin and cause severe and
painful burns. The fumes from sulfuric acid can severely damage lung tissue.