FED-STD-791D
064 Sodium dichromate Na2Cr2O7
2H2O
Synonyms: Sodium bichromate, Sodium acid chromate.
Life Hazard: A recognized carcinogen. Dust may cause skin and nasal irritation. Strong
solutions can irritate the skin. Hazardous reaction with:
Condition
Reaction
Carbide
Mixing
Ignition & explosion
amines such as hydrazine, hydroxylamine, anilin
Mixing
Ignition & explosion
Slaked lime
Mixing
Ignition & explosion
Mercuric cyanides
Friction
Heat evolution &
decomposition
Ignition
Oxidizable materials
Contact
Flammability: Decomposes by heating and discharging oxygen, thus promotes the
combustion.
Handling: Keep away from inflammables and easily oxidizable substances; tightly close
and store in dry place. Wooden floor is not recommendable.
Emergency Treatment and Measures:
a. Hygienic Precations: Adequate ventilation. Chest X-rays every six months up to
five years exposure and every three months in excess thereof. Papanicolaou studies
of sputum every three months.
b. First Aid: If swallowed, call a physician.
c. Fire Precautions (In case of outbreak): Put out fire by flooding water.
Spills:
Cover with weak reducing agents such as hypo, bisulfites or ferrous salts.
Bisulfites or ferrous salts need additional promoter of some 3M-H2SO4 for rapid
reaction. Transfer the slurry (or sludge) into a large container of water and
neutralize with soda ash. Drain into the sewer with abundant water.
065 Sodium hydroxide NaOH
Synonyms: Caustic soda, Sodium hydrate, White caustic, Soda lye.
Life Hazard: Toxic. A severe eye hazard; solid or concentrated solution destroys tissue
on contact.
Flammability: Not combustible but solid form in contact with moisture or water may
generate sufficient heat to ignite combustible materials. Contact with
some metals can generate hydrogen gas.
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