Potassium nitrite
| Potassium nitrite | |
|---|---|
| Identifiers | |
| CAS number | 7758-09-0  |
| PubChem | 516910 |
| ChemSpider | 22857 |
| UNII | 794654G42L |
| RTECS number | TT3750000 |
| Jmol-3D images | Image 1 |
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| Properties | |
| Molecular formula | KNO2 |
| Molar mass | 85.10379 g/mol |
| Appearance | white or slight yellow solid deliquescent |
| Density | 1.914986 g/cm3 |
| Melting point |
440.02 °C (decomp) |
| Solubility in water | 281 g/100 mL (0 °C) 413 g/100 mL (100 °C) |
| Solubility | soluble in alcohol, ammonia |
| Hazards | |
| MSDS | External MSDS |
| EU classification | Oxidant (O) Harmful (Xn) Dangerous for the environment (N) |
| R-phrases | R8 R25 R50. |
| S-phrases | S45 S61 |
| NFPA 704 |
 0
2
2
OX
|
| Flash point | Non-flammable |
| LD50 | 235 mg/kg |
| Related compounds | |
| Other anions | Potassium nitrate |
| Other cations | Sodium nitrite |
 (verify) (what is:  / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
Potassium nitrite (distinct from potassium nitrate) is a salt with chemical formula KNO2.
It is a strong oxidizer and may accelerate the combustion of other materials. Like other nitrite salts such as sodium nitrite, potassium nitrite is toxic if swallowed, and laboratory tests suggest that it may be mutagenic or teratogenic. Gloves and safety glasses are usually used when handling potassium nitrite.
Potassium nitrite is used in the manufacturing of heat transfer salts. As food additive E249, potassium nitrite is a preservative similar to sodium nitrite and is approved for usage in the EU,[1] USA[2] and Australia and New Zealand[3] (where it is listed under its INS number 249).
[edit] See also
[edit] External links
- ^ UK Food Standards Agency: "Current EU approved additives and their E Numbers". http://www.food.gov.uk/safereating/chemsafe/additivesbranch/enumberlist. Retrieved 2011-10-27.
- ^ US Food and Drug Administration: "Listing of Food Additives Status Part II". http://www.fda.gov/Food/FoodIngredientsPackaging/FoodAdditives/ucm191033.htm#ftnT. Retrieved 2011-10-27.
- ^ Australia New Zealand Food Standards Code"Standard 1.2.4 - Labelling of ingredients". http://www.comlaw.gov.au/Details/F2011C00827. Retrieved 2011-10-27.
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