Quick Search

PRODUCTS

E249 (POTASSIUM NITRITE)

CAS NUMBER: 7758-09-0

EC NUMBER: 231-832-4

MOLECULAR FORMULA: KNO2

MOLECULAR WEIGHT: 85.104

 

E249 (Potassium nitrite) is the inorganic compound with the chemical formula KNO2. 
E249 (Potassium nitrite) is an ionic salt of potassium ions K+ and nitrite ions NO2−, which forms a white or slightly yellow, hygroscopic crystalline powder that is soluble in water.

E249 (Potassium nitrite) is a strong oxidizer and may accelerate the combustion of other materials. 
E249 (Potassium nitrite) is toxic if swallowed, and laboratory tests suggest that it may be mutagenic or teratogenic. 

E249 (Potassium nitrite) is present at trace levels in soil, natural waters, plant and animal tissues, and fertilizer.
E249 (Potassium nitrite) can be obtained by the reduction of potassium nitrate. 

The production of E249 (Potassium nitrite) by absorption of nitrogen oxides in potassium hydroxide or potassium carbonate is not employed on a large scale because of the high price of these alkalies. 
E249 (Potassium nitrite) is highly soluble in water makes the solid difficult to recover.

E249 (Potassium nitrite) appears as a yellowish white crystalline solid. 
E249 (Potassium nitrite) is noncombustible but accelerates the burning of all combustible material. 

E249 (Potassium nitrite) is may exploded under prolonged exposure to heat.
E249 (Potassium nitrite) is used to make other chemicals and in chemical analysis.

E249 (Potassium nitrite) is a strong oxidizer and used in laboratories to test for amino acids and to accelerate the combustion of other materials. 
E249 (Potassium nitrite) is used in experiments as a source of nitrites, which was observed to decrease blood pressure and lead to hypertrophy.

E249 (Potassium nitrite)s are commonly used in curing mixtures to develop and fix the colour of meat, to inhibit microbial growth and/or to develop characteristic flavours.
E249 (Potassium nitrite) is the inorganic compound with the chemical formula KNO2.

E249 (Potassium nitrite) reacts at an extremely slow rate with a liquid ammonia solution of potassium amide at room temperatures, and in the presence of ferric oxide or cobaltic oxide, to form nitrogen and potassium hydroxide.
E249 (Potassium nitrite) is a white or slightly yellowish hygroscopic solid, very soluble in water. 

E249 (Potassium nitrite) is insoluble in most organic solvents, although it shows some solubility in low-chain alcohols, which increases with temperature.
E249 (Potassium nitrite) is sold by chemical suppliers.

A quick and clean route to E249 (Potassium nitrite) is by bubbling an excess of nitric oxide through a solution of potassium hydroxide, with the NO being obtained by dissolving copper metal in nitric acid. 
E249 (Potassium nitrite) can be oxidized to the less harmful potassium nitrate by heating it in air until it melts but kept below 500 °C, then allowed to oxidize to potassium nitrate. 

The resulting E249 (Potassium nitrite) can then be used as fertilizer, provided it's not contaminated with nitrite or heavy metals.
E249 (Potassium nitrite) appears as a yellowish white crystalline solid.

E249 (Potassium nitrite) is the inorganic compound with the chemical formula KNO2. 
E249 (Potassium nitrite) is an ionic salt of potassium ions K+ and nitrite ions NO2−, which forms a white or slightly yellow, hygroscopic crystalline powder that is soluble in water.

E249 (Potassium nitrite) is a chemical compound of potassium and nitrite ions. 
E249 (Potassium nitrite) is used as a food preservative and in the manufacturing of heat transfer salts.

E249 (Potassium nitrite) is the nitrite salt of potassium, appearing as a yellowish white crystalline solid. 
As a strong oxidizer, E249 (Potassium nitrite) may promote combustion and even explosion of other materials. 

In medical field, E249 (Potassium nitrite) is used for the treatment of angina pectoris. 
E249 (Potassium nitrite) is also applied during the manufacturing of heat transfer salts. 

E249 (Potassium nitrite) is also a kind of food additive as a preservative. 
E249 (Potassium nitrite) can also be used as a paint and coating additive, analytic agents, corrosion inhibitors and anti-scaling agent. 

In chemical industry, E249 (Potassium nitrite) 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.
E249 (Potassium nitrite) is a color fixative in meats which exists as white or yellowish granules or cylindrical sticks. 

E249 (Potassium nitrite) is very soluble in water. see nitrite.
E249 (Potassium nitrite) isprepared by the reduction of potassium nitrate. 

E249 (Potassium nitrite) reacts with cold dilute mineral acids to give nitrous acid and is also able to behave as a reducing agent (if oxidized to the nitrate)or as an oxidizing agent (if reducedto nitrogen). 
E249 (Potassium nitrite) is used inorganic synthesis because of its part in diazotization, and in detecting thepresence of the amino groups in organic compounds.

E249 (Potassium nitrite) is yellowish-white solid, soluble, for med (1) by reaction of nitric oxide plus nitrogen tetroxide and potassium carbonate or hydroxide, and then evaporating, (2) by heating potassium nitrate and lead to a high temperature and then extracting the soluble portion (lead monoxide insoluble) with H2O, and evaporating.
E249 (Potassium nitrite) is an oxidizing agent. 

The resulting heat may ignite surrounding combustible material. 
E249 (Potassium nitrite) reacts with acids to form toxic nitrogen dioxide gas.

 


USES:

Interest in a medical role for E249 (Potassium nitrite) was first aroused because of the spectacular success of organic nitrites and related compounds in the treatment of angina pectoris. 
E249 (Potassium nitrite) is compared the biological action of E249 (Potassium nitrite) with that of amyl and ethyl nitrites and concluded that the similarity of action depends on the conversion of organic nitrites to nitrous acid. 

Solutions of E249 (Potassium nitrite) have been used successfully to generate and to induce vasorelaxation in isolated blood vessel studies, and the same reaction mechanism has been proposed to explain the biological action of nitrite.
E249 (Potassium nitrite) is used in the manufacturing of heat transfer salts. 

E249 (Potassium nitrite) is a preservative similar to sodium nitrite and is approved for usage in the EU.
E249 (Potassium nitrite) is a white to yellowish, easily dissolvable granule or rod-shaped material. 

E249 (Potassium nitrite) is used in chemical analysis, as a food additive, in medications and in fertilizers. 
E249 (Potassium nitrite) is a white/yellowish crystalline. 

As a result of E249 (Potassium nitrite)s oxidizing properties, E249 (Potassium nitrite) can be used as an oxidizer in a variety of industries. 
Examples are corrosion inhibitor, reducing agent Benfield process (fertilizer production) and in glass frit for enamel glazing. 

E249 (Potassium nitrite) is sold as a moist crystal to help delay the onset of caking. 
E249 (Potassium nitrite) is also known as Nitrous acid, potassium salt or as formula KNO2.

E249 (Potassium nitrite) is used as a food preservative, paint and coating additives and analytical reagent. 
E249 (Potassium nitrite) is used as a strong oxidizing agent as well as involved in the preparation of heat transfer salts. 

In addition, E249 (Potassium nitrite) is employed as corrosion inhibitors and anti-scaling agents.
E249 (Potassium nitrite) is a yellowish-white crystalline solid. 

When potassium ions react with nitrate ions potassium nitrate is formed. 
Potassium nitrate is a hygroscopic crystalline inorganic compound and is toxic in nature

E249 (Potassium nitrite) has a heat capacity of 107.4 J/mol K and magnetic susceptibility of −23.3·10−6 cm3/mol. 
The structural formula of E249 (Potassium nitrite) is as shown below in the diagram.

E249 (Potassium nitrite) is used as a food preservative, paint and coating additives and analytical reagent. 
E249 (Potassium nitrite) is used as a strong oxidizing agent as well as involved in the preparation of heat transfer salts. 

E249 (Potassium nitrite) is employed as corrosion inhibitors and anti-scaling agents.
E249 (Potassium nitrite) is used as a reagent.

E249 (Potassium nitrite) is used as oxidizing agent and corrosion inhibitor in washing with hot potash for removal of Co2 from gas streams like synthesis gas. 
E249 (Potassium nitrite) is more soluble than sodium nitrite and does not form sparingly soluble bicarbonate in carbondioxide rich solutions.

E249 (Potassium nitrite) is used in the medical field.
E249 (Potassium nitrite) is used in food additives, preservatives.

 


APPLICATION:

E249 (Potassium nitrite) is used as a food preservative, paint and coating additives and analytical reagent. 
E249 (Potassium nitrite) is used as a strong oxidizing agent as well as involved in the preparation of heat transfer salts.
E249 (Potassium nitrite) is employed as corrosion inhibitors and anti-scaling agents.

 

-Appearance: Powder

-Physical State: Solid

-Solubility: Soluble in water (290 mg/ml at 20° C).

-Storage: Store at room temperature

-Melting Point: 350° C (lit.)(dec.)

-Density: 1.92 g/cm3 at 20° C

 

PHYSICAL AND CHEMICAL PROPERTIES:

-Density: 0.834 g/cm3 (27.6 °C)

-Melting Point: 349.8 °C

-pH value: 6.65 (H₂O, 27 °C)

-Bulk density: 980 kg/m3

-Solubility: 2810 g/l

 


SPECIFICATION:

-Melting Point: 350°C (decomposition)

-pH: 7.0 to  10.0

-UN Number: UN1488

-Merck Index: 14,7649

-Formula Weight: 85.11

-Percent Purity: 97%

-Odor: Odorless

-Sensitivity: Hygroscopic

 

REACTION:

The mixing of cyanamide and E249 (Potassium nitrite) produces changes from white solids to yellow liquid and then to orange solid, forming cyanogen and ammonia gases. 
No external energy is used and the reactions are carried out with a small amount of O2.

E249 (Potassium nitrite) forms potassium nitrate when heated in the presence of oxygen from 550 °C to 790 °C. 
The rate of reaction increases with temperature, but the extent of reaction decreases. 

At 550 °C and 600 °C the reaction is continuous and eventually goes to completion. 
From 650 °C to 750 °C, as the case of decomposition of potassium nitrate is, the system attains equilibrium. 

At 790 °C, a rapid decrease in volume is first observed, followed by a period of 15 minutes during which no volume changes occur. 
E249 (Potassium nitrite) is then followed by an increase in volume due primarily to the evolution of nitrogen, which is attributed to the decomposition of E249 (Potassium nitrite).
E249 (Potassium nitrite) reacts at an extremely slow rate with a liquid ammonia solution of potassium amide at room temperatures, and in the presence of ferric oxide or cobaltic oxide, to form nitrogen and potassium hydroxide.

 

STORAGE:

E249 (Potassium nitrite) is stored with other oxidizing agents but separated from flammables, combustibles, reducing agents, acids, cyanides, ammonium compounds, amides, and other nitrogenous salts in a cool, dry, well ventilated location.
Store under Nitrogen. 
Ambient temperatures.

 

SYNONYM:

Nitrous acid, potassium salt
potassium;nitrite
UNII-794654G42L
MFCD00011408
794654G42L
Caswell No. 698
CCRIS 3959
HSDB 1216
EINECS 231-832-4
UN1488
E249 (Potassium nitrite) (1:1)
EPA Pesticide Chemical Code 076203
Kaliumnitrit
E249 (Potassium nitrite) (KNO2)
DSSTox_CID_22320
DSSTox_RID_79993
K.NO2
DSSTox_GSID_42320
E249 (Potassium nitrite), ACS grade
CHEMBL3186418
DTXSID5042320
E249 (Potassium nitrite), p.a., 97%
Tox21_301322
8792AF
Nitrous acid, potassium salt

  • Share !
E-NEWSLETTER