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Description Reference
Chemical Name:
Kaliumnitrit;NPotassiuM nitri;POTASSIUM NITRITE;PotassiumNitriteFcc;potassiumnitrite(1:1);Nitrous acid potassium;POTASSIUM NITRITE, ACS;POTASSIUM NITRITE R. G.;POTASSIUM NITRITE, 97+%;Potassium nitrite, 96+%
Molecular Formula:
Formula Weight:
MOL File:


Melting point:
350 °C (dec.)(lit.)
Boiling point:
explodes at 537℃ [HAW93]
1,92 g/cm3
storage temp. 
Store at +5°C to +30°C.
water: soluble0.35 part
White to slightly yellow
7-10 (50g/l, H2O, 20℃)
Water Solubility 
Soluble in water, hot alcohol, liquid NH{3}Soluble in water, alcohol and ammonia.
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.
CAS DataBase Reference
7758-09-0(CAS DataBase Reference)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Hazard Codes  O,T,N
Risk Statements  8-25-50
Safety Statements  45-61
RIDADR  UN 1488 5.1/PG 2
WGK Germany  2
RTECS  TT3750000
HazardClass  5.1
PackingGroup  II
Toxicity LD50 orally in rabbits: 108 mg anion/kg, Dollahite, Rowe, Southwest. Vet. 27, 246 (1974)
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H272 May intensify fire; oxidizer Oxidising liquids;Oxidising solids Category 2
Category 3
P210, P220, P221P280, P370+P378,P501
H301 Toxic if swalloed Acute toxicity,oral Category 3 Danger P264, P270, P301+P310, P321, P330,P405, P501
H400 Very toxic to aquatic life Hazardous to the aquatic environment, acute hazard Category 1 Warning P273, P391, P501
Precautionary statements:
P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P220 Keep/Store away from clothing/…/combustible materials.
P221 Take any precaution to avoid mixing with combustibles/…
P273 Avoid release to the environment.
P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.
P370+P378 In case of fire: Use … for extinction.
P405 Store locked up.

POTASSIUM NITRITE price More Price(10)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 12654 Potassium nitrite meets analytical specification of FCC, 97-100.5% 7758-09-0 1kg $161 2018-11-13 Buy
Sigma-Aldrich 12654 Potassium nitrite meets analytical specification of FCC, 97-100.5% 7758-09-0 2.5kg $343 2018-11-13 Buy
Alfa Aesar 014245 Potassium nitrite, ACS, 96.0% min 7758-09-0 10g $19.2 2018-11-16 Buy
Alfa Aesar 014245 Potassium nitrite, ACS, 96.0% min 7758-09-0 100g $56 2018-11-16 Buy
Sigma-Aldrich 1.05067 Potassium nitrite cryst. for analysis EMSURE ACS 7758-09-0 1050670250 $280 2018-11-23 Buy

POTASSIUM NITRITE Chemical Properties,Uses,Production


Potassium is the nitrite salt of potassium, appearing as a yellowish white crystalline solid. As a strong oxidizer, it may promote combustion and even explosion of other materials. In medical field, it is used for the treatment of angina pectoris. It is also applied during the manufacturing of heat transfer salts. Moreover, it is also a kind of food additive as a preservative. In addition, it can also be used as a paint and coating additive, analytic agents, corrosion inhibitors and anti-scaling agent. In chemical industry, it has the following applications: Manufacture Of Pigment Yellow 40, cinitapride and many other drugs, butadiene distillation, production of D-saccharic acid, dissolution of tungston, recovery of bromine and separation of cobalt from cobalt nickel solutions.



Chemical Properties

Potassium nitrite is a white to yellowish crystalline solid.

Chemical Properties

white to yellow crystals


Potassium Nitrite is a color fixative in meats which exists as white or yellowish granules or cylindrical sticks. it is very soluble in water. see nitrite.


In analytical chemistry.

General Description

A yellowish white crystalline solid. Noncombustible but accelerates the burning of all combustible material. If large quantities are involved in fire or if the combustible material is finely divided, an explosion may result. May explode under prolonged exposure to heat. Toxic oxides of nitrogen are produced in fires. Used to make other chemicals and in chemical analysis.

Air & Water Reactions

Water soluble.

Reactivity Profile

POTASSIUM NITRITE is an oxidizing agent. Mixtures with phosphorus, tin(II) chloride or other reducing agents may react explosively [Bretherick 1979 p. 108-109]. Contamination by ammonium compounds can initiate spontaneous decomposition. The resulting heat may ignite surrounding combustible material. Reacts with acids to form toxic nitrogen dioxide gas. Mixing with liquid ammonia forms diPOTASSIUM NITRITE, which is very reactive and easily explosive [Mellor 2, Supp. 3:1566 1963]. Melting together with an ammonium salt leads to a violent explosion [Von Schwartz 1918 p. 299]. A mixture with potassium cyanide may cause an explosion. When a little ammonium sulfate is added to fused POTASSIUM NITRITE, a vigorous reaction occurs attended by flame [Mellor 2:702. 1946-47].


Fire and explosion risk when shocked or heated, or in contact with organic materials, strong oxidizing agent.

Health Hazard

Inhalation, ingestion or contact (skin, eyes) with vapors or substance may cause severe injury, burns or death. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may cause pollution.

Fire Hazard

These substances will accelerate burning when involved in a fire. Some may decompose explosively when heated or involved in a fire. May explode from heat or contamination. Some will react explosively with hydrocarbons (fuels). May ignite combustibles (wood, paper, oil, clothing, etc.). Containers may explode when heated. Runoff may create fire or explosion hazard.

Safety Profile

Poison by ingestion. Human systemic effects: tinnitus, pulse rate increase, blood pressure lowering. Experimental teratogenic and reproductive effects. Nitrites have been implicated in an increased incidence of cancer. Mutation data reported. Flammable when exposed to heat or flame. A powerful oxidzing material. Slight explosion hazard when exposed to heat. It wdl explode at 1000°F. Explosive reaction with potassium amide + heat, potassium cyanide or other cyanide salts + heat. Violent reaction or ignition with ammonium salts (e.g., ammonium sulfate), boron. Disproportionates on heating in the absence of air forming KNO3 and K2O and evolving N2. Upon decomposition it emits toxic fumes of K2O. See also NITRITES.

Potential Exposure

Potassium nitrite is used in chemical analysis, as a food additive; in fertilizers; in medications as a vasodilator and as antidote for cyanide poisoning.

First aid

If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, includ- ing resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medi- cal attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit. Medical observation is recommended for 24?48 hours after breathing overexposure, as pulmonary edema may be delayed. As first aid for pulmonary edema, a doctor or authorized paramedic may consider administering a drug or other inhalation therapy.


UN1488 Potassium nitrite, Hazard Class: 5.1; Labels: 5.1-Oxidizer. UN1479 Oxidizing solid, n.o.s., Hazard Class: 5.1; Labels: 5.1-Oxidizer, Technical Name Required.

Purification Methods

A saturated solution at 0o is warmed and partially evaporated under vacuum. The crystals so obtained are filtered off from the warm solution. (This procedure is designed to reduce the level of nitrate impurity and is based on the effects of temperature on solubility. The solubility of KNO3 in water is 13g/100mL at 0o, 247g/100mL at 100o; for KNO2 the corresponding figures are 280g/100mL and 413g/100mL.) Alternatively, dissolve it in H2O and precipitate by adding of EtOH.


A strong oxidizer. Reacts violently with combustible and reducing materials. Heat above 530 ? C may cause explosion. Incompatible with cyanide salts; boron, ammonium sulfate; potassium amide; and acids. Decomposes on contact with even weak acids producing toxic nitrogen oxide fumes.

POTASSIUM NITRITE Preparation Products And Raw materials

Raw materials

Preparation Products


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