Potassium nitrite

Potassium nitrite
Identifiers
CAS number	7758-09-0 Y
PubChem	516910
RTECS number	TT3750000
Properties
Molecular formula	KNO2
Molar mass	85.1038 g/mol
Appearance	white or slight yellow solid deliquescent
Density	1.915 c/cm3
Melting point	440 °C (decomp)
Solubility in water	281 g/100 mL (0 °C) 413 g/100 mL (100 °C)
Solubility	soluble in alcohol, ammonia
Hazards
EU Index	Not listed
NFPA 704	0 2 2 OX
Flash point	Non-flammable
LD50	200 mg/kg
Related compounds
Other anions	Potassium nitrate
Other cations	Sodium nitrite
Y (what is this?)  (verify) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Potassium nitrite, with chemical formula KNO₂, is a material which contains potassium and nitrogen.

Potassium nitrite should not be confused with potassium nitrate.

As a food additive, potassium nitrite is used as a preservative in a manner similar to that of sodium nitrite. It has the E number E249.

Potassium nitrite is a strong oxidizer and contact with skin or clothing, as well as inhalation and ingestion, should be avoided.

Potassium nitrite is used in the manufacturing of heat transfer salts, and is highly combustible.

See also

• Sodium nitrite
• Potassium nitrate
• Nitrite

External links

• International Chemical Safety Card 1069

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