Name | Potassium nitrite |
Synonyms | UN1488 HSDB 1216 CCRIS 3959 UNII-794654G42L POTASSIUM NITRITE Potassium nitrite POTASSIUM NITRITE R. G. Nitrousacidpotassiumsalt Nitrousacid,potassiumsalt Nitrous acid, potassium salt nitrousacid,potassiumsalt[qr] EPA Pesticide Chemical Code 076203 Potassium nitrite [UN1488] [Oxidizer] |
CAS | 7758-09-0 |
EINECS | 231-832-4 |
InChI | InChI=1/K.HNO2/c;2-1-3/h;(H,2,3)/q+1;/p-1 |
Molecular Formula | KNO2 |
Molar Mass | 85.1038 |
Density | 1,92 g/cm3 |
Melting Point | 350°C (dec.)(lit.) |
Boling Point | explodes at 537℃ [HAW93] |
Water Solubility | Soluble in water, hot alcohol, liquid NH{3}Soluble in water, alcohol and ammonia. |
Solubility | water: soluble0.35 part |
Vapor Density | 2.9 (vs air) |
Appearance | Solid |
Specific Gravity | 1.915 |
Color | White to slightly yellow |
Odor | Odorless |
Merck | 14,7649 |
PH | 7-10 (50g/l, H2O, 20℃) |
Storage Condition | Store at +5°C to +30°C. |
Stability | Stability Stable, but strong oxidizer - contact with combustible material may lead to fire. Incompatible with strong reducing agents, strong acids, combustible materials, cyanides, ammonium salts. |
Sensitive | Hygroscopic |
Physical and Chemical Properties | White or light yellow columnar crystals. Easy deliquescence, soluble in liquid ammonia and water, alkaline aqueous solution. Slightly soluble in alcohol, not solution in acetone. In 350.C begins to decompose to form potassium oxide, and nitrogen oxide gas is released. Potassium nitrite as oxidant, toxic! Contact with organic matter. Combustible materials can be burned and exploded, and release toxic and irritating peroxygen nitrogen and nitrogen oxide gas. Mixing with iron salt or cyanide can be explosive. |
Use | Organic synthesis used as reducing agent. Food chromogenic agents, chemical reagents, can also be used in the manufacture of aniline dyes and azo dyes, medicine, gold for nickel drill separation. |
Risk Codes | R8 - Contact with combustible material may cause fire R25 - Toxic if swallowed R50 - Very Toxic to aquatic organisms |
Safety Description | S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
UN IDs | UN 1488 5.1/PG 2 |
WGK Germany | 2 |
RTECS | TT3750000 |
TSCA | Yes |
HS Code | 2834 10 00 |
Hazard Class | 5.1 |
Packing Group | II |
Toxicity | LD50 orally in rabbits: 108 mg anion/kg, Dollahite, Rowe, Southwest. Vet. 27, 246 (1974) |
Raw Materials | Potassium carbonate Calcium nitrite Sodium nitrite |
colorless transparent prism crystals or white, yellow granular or rod-like crystals. d 1.915; Melting point 441. Decomposition begins at 3 50 °c to form potassium oxide, and nitrogen oxide gas is evolved. Deliquescence. Soluble in 0. 35 parts of water, the aqueous solution is alkaline. Slightly soluble in ethanol, soluble in glycerol, insoluble in ethanol. Can be diluted acid decomposition to produce nitrite anhydride. Contact with organic matter, friction or impact, can cause combustion or explosion, and release toxic and irritating peroxygen nitrogen and nitrogen oxide gas.
potassium carbonate was dissolved in water, and after heating, an aqueous solution of sodium nitrite was added. The precipitated sodium carbonate crystals were filtered off and cooled to precipitate potassium nitrite crystals.
An Analytical reagent for the determination of amino acids, diiodide, strontium, urea, etc. It is also used in organic synthesis, steel analysis, etc.
toxic l rabbit oral LDso:108mg (anion)/kg. Do not contact with organic matter, reducing agents, flammable materials or metal powders.