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Potassium nitrite

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Name

Potassium nitrite

EINECS 231-832-4
CAS No. 7758-09-0 Density 1,92 g/cm3
PSA 52.49000 LogP 0.25060
Solubility N/A Melting Point 350 °C (dec.)(lit.)
Formula KNO2 Boiling Point N/A
Molecular Weight 85.1038 Flash Point N/A
Transport Information UN 1488 5.1/PG 2 Appearance white to yellow crystals
Safety 45-61 Risk Codes 8-25-50
Molecular Structure Molecular Structure of 7758-09-0 (Potassium nitrite(III)) Hazard Symbols OxidizingO,ToxicT,DangerousN
Synonyms

Nitrousacid, potassium salt (8CI,9CI);E 249;Klear;Nitrous acid, potassiumsalt (1:1);Potassium nitrite (1:1);

Article Data 120

Potassium nitrite Synthetic route

potassium chloride

7632-00-0

sodium nitrite

7758-09-0

potassium nitrite

Conditions
ConditionsYield
In water 88-97 % KNO2 content after evapn. to dryness and recrystn.; NaCl removed by pptn. by AgNO2 or AgNO3;91%
In water 88-97 % KNO2 content after evapn. to dryness and recrystn.; NaCl removed by pptn. by AgNO2 or AgNO3;91%

potassium cyanide

7440-22-4

silver

A

7758-09-0

potassium nitrite

B

potassium nitrate

Conditions
ConditionsYield
A <1
B 65.2%
A <1
B 65.2%
1493-05-6

difluoro-nitro-methane

865-47-4

potassium tert-butylate

A

potassium fluoride

B

7758-09-0

potassium nitrite

C

105-58-8

Diethyl carbonate

Conditions
ConditionsYield
In tetrahydrofuran byproducts: NO3(1-); alkoxide soln. addn. to F2C(NO2)2 soln. (molar ratio F2C(NO2)2:nucleophile=1:2), reacting (-10°C for 10-15 min), stirring (0°C for 1 h, further at 20°C for 2 h); salts. ppt. sepn. (CH2Cl2 addn.) after 1 d; chem. and GLC anal.;A 43%
B n/a
C 11%
1493-05-6

difluoro-nitro-methane

865-47-4

potassium tert-butylate

A

potassium fluoride

B

7758-09-0

potassium nitrite

Conditions
ConditionsYield
In N,N-dimethyl-formamide alkoxide soln. addn. to F2C(NO2)2 soln. (molar ratio F2C(NO2)2:nucleophile=1:2), reacting (-10°C for 10-15 min), stirring (-50°C,then at 0°C for 2 d); salts. ppt. sepn. (CH2Cl2 addn.); chem. and GLC anal.;A 19%
B 25%

potassium cyanide

A

7758-09-0

potassium nitrite

B

potassium nitrate

Conditions
ConditionsYield
With clay; soda lime; oxygen 370°C;with air;A 2.6%
B 23.2%
With O2; soda lime; clay 370°C;with air;A 2.6%
B 23.2%
1493-05-6

difluoro-nitro-methane

917-58-8

potassium ethoxide

A

potassium fluoride

B

7758-09-0

potassium nitrite

C

105-58-8

Diethyl carbonate

Conditions
ConditionsYield
In ethanol; dichloromethane alkoxide soln. (EtOH) addn. to F2C(NO2)2 soln. (CH2Cl2) (molar ratio F2C(NO2)2:nucleophile=1:1), reacting (-10°C for 10-15 min), stirring (0°C for 1 h); salts. ppt. sepn. (CH2Cl2 addn.); chem. and GLC anal.;A n/a
B n/a
C 8%
584-08-7

potassium carbonate

7758-09-0

potassium nitrite

Conditions
ConditionsYield
With nitrous gas In water excluding air; nitrous gas, obtained by redn. of HNO3 by As2O3 or starch, introduced in concd. soln. until complete neutralization; NO in small excess compared to NO2;
In water double reaction of Ba-, Ag- or K-Pb-nitrite with K2CO3; soln. concd. in vacuo, dried in H2 at ambient temp. then at 100 °C;
In water double reaction of Ba-, Ag- or K-Pb-nitrite with K2CO3; soln. concd. in vacuo, dried in H2 at ambient temp. then at 100 °C;
With nitrous gas In water excluding air; nitrous gas, obtained by redn. of HNO3 by As2O3 or starch, introduced in concd. soln. until complete neutralization; NO in small excess compared to NO2;
584-08-7

potassium carbonate

7632-00-0

sodium nitrite

7758-09-0

potassium nitrite

Conditions
ConditionsYield
In water for prepn. of large quantities; KNO2 content 85-99.8 %;>=72
In water for prepn. of large quantities; KNO2 content 85-99.8 %;>=72

barium sulfide

potassium nitrate

7758-09-0

potassium nitrite

Conditions
ConditionsYield
heating in iron crucible to glow;
heating in iron crucible to glow;
7783-99-5

silver(I) nitrite

potassium chloride

7758-09-0

potassium nitrite

Conditions
ConditionsYield
In water pure KNO2 if AgNO2 was prepd. from NaNO2 purified by recrystn.;
In water pure KNO2 if AgNO2 was prepd. from NaNO2 purified by recrystn.;

Potassium nitrite Chemical Properties

Molecular Structure of Potassium nitrite (1:1) (CAS NO.7758-09-0):

IUPAC Name: Potassium nitrite
Canonical SMILES: N(=O)[O-].[K+]
InChI: InChI=1S/K.HNO2/c;2-1-3/h;(H,2,3)/q+1;/p-1
InChIKey: BXNHTSHTPBPRFX-UHFFFAOYSA-M
Molecular Weight: 85.1038 [g/mol]
Molecular Formula: KNO2
H-Bond Donor: 0
H-Bond Acceptor: 3 
EINECS: 231-832-4
Appearance: white to yellow crystals
Melting Point: 350 °C (dec.)(lit.)
density: 1,92 g/cm3
Sensitive: Hygroscopic
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.
Classification Code: Drug / Therapeutic Agent; Human Data; Mutation data; Reproductive Effect 

Potassium nitrite Uses

 Potassium nitrite (1:1) (CAS NO.7758-09-0) is used for reducing agent, food chromogenic reagent and chemical agent in organic synthesis. And it also can be used for manufacturing aniline dyes and azo dyes and separating cunico in metallurgy.

Potassium nitrite Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
human TDLo oral 1428ug/kg (1.428mg/kg) SENSE ORGANS AND SPECIAL SENSES: TINNITUS: EAR

CARDIAC: PULSE RATE INCREASE WITHOUT FALL IN BP

VASCULAR: BP LOWERING NOT CHARACTERIZED IN AUTONOMIC SECTION
Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. 48(1), Pg. 62, 1983.
mouse LC50 inhalation 85gm/m3/2H (85000mg/m3) BEHAVIORAL: SLEEP

BEHAVIORAL: EXCITEMENT

BEHAVIORAL: MUSCLE CONTRACTION OR SPASTICITY)
Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. 48(1), Pg. 62, 1983.
rabbit LD50 oral 200mg/kg (200mg/kg)   Southwestern Veterinarian. Vol. 27, Pg. 246, 1974.

Potassium nitrite Consensus Reports

Reported in EPA TSCA Inventory.

Potassium nitrite Safety Profile

Safety Information of Potassium nitrite (1:1) (CAS NO.7758-09-0):
Hazard Codes: OxidizingO, ToxicT, DangerousN
Risk Statements: 8-25-50
R 8: Contact with combustible material may cause fire
R 25: Toxic if swallowed.
R 50: Very Toxic to aquatic organisms.
Safety Statements: 45-61
S 45: In case of accident or if you feel unwell, seek medical advice immediately (show label where possible).
S 61: Avoid release to the environment. Refer to special instructions safety data sheet.
RIDADR: UN 1488 5.1/PG 2
WGK Germany: 2
HazardClass: 5.1
PackingGroup: II

Potassium nitrite Standards and Recommendations

DOT Classification:  5.1; Label: Oxidizer

Potassium nitrite Specification

  Potassium nitrite (1:1) (CAS NO.7758-09-0), its Synonyms are Nitrous acid, potassium salt ; Nitrous acid, potassium salt (1:1) ; Potassium nitrite .

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