Agent Name

Nitrous acid

CAS Number

7782-77-6

Formula

H-N-O2

Major Category

Toxic Gases & Vapors

Synonyms

Kyselina dusite [Czech]; Nitrosyl hydroxide; [ChemIDplus]

Category

Acids, Inorganic

Description

Exists only in solution; Light blue liquid; [Merck Index]

Sources/Uses

Formed as a product of combustion and when nitrogen dioxide reacts with water; Used to make diazotizing compounds and as a source of nitric oxide; [HSDB]

Comments

Rapidly forms nitric oxide and nitric acid in water; [Merck Index] A strong oxidizer; Causes burns; Highly toxic by ingestion and inhalation; [EPA OHM/TADS] See "Nitric acid."

Adverse Effects
Toxic Pneumonitis

Yes

Dermatotoxin

Skin Burns

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