FED-STD-791D
Handling: N/A
Emergency Treatment and Measures:
a. Hygienic Precautions: N/A
b. First Aid: N/A
c. Fire Precautions (In case of outbreak): N/A
Spills:
N/A
046 Nitric acid HNO3
Synonyms: Aqua Fortis, Engraver's Acid, Azotic Acid.
Life Hazard: Dangerous when heated to decomposition, it emits highly toxic fumes of
NOx and hydrogen nitrate; will react with water and steam to produce heat
and toxic and corrosive fumes. Liquid causes severe tissue burns.
Risks by Contacts under Mixed Conditions
Hazardous
Items
Conditions
Phenomenom
Remarks
Substances if
contacts are
made
Alcohol
Ignition
Forms ester
Contacts
The use of
Nitric Acid
Inflammables
Ignition
under
nitric acid is
of nitric acid
Copper
Decompositio
normal
hazardous
Chloride of β-
when
n explosion
temperature
selenium is
diketone
oxidized
Concentrated
Acetylene
Ignition or
Forms
into selenic
explosion
tetranitro-
Nitric Acid
acid as it
Organics
methane
forms an
Conc.
explosive
ammonia
ammonium
coagulate
water
Ignition or
nitrate
during the
Conc. amines
explosion
drying up.
Ignition or
amine nitrate
Nitrogen
explosion
Phosphorus
dioxide
Ignition or
forms
may
Carbohydrates
explosion
nitrocellulose,
explode by
Ignition or
nitrostarch &
heating if it
Organic acid
explosion
acetyl nitrate
does not
Ignition or
dissolve
Strong
explosion
completely
oxidizing
during the
agent
425
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