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Sigma-Aldrich

Potassium nitrite

ACS reagent, ≥96.0%

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About This Item

Empirical Formula (Hill Notation):
KNO2
CAS Number:
7758-09-0
Molecular Weight:
85.10
EC Number:
231-832-4
MDL number:
MFCD00011408
UNSPSC Code:
12352300
PubChem Substance ID:
329753627
NACRES:
NB.24

grade

ACS reagent

Quality Level

200

assay

≥96.0%

form

powder or crystals

impurities

≤0.01% insolubles

pH

7-10 (25 °C, 50 g/L)

mp

350 °C (dec.) (lit.)

anion traces

chloride (Cl-): ≤0.03%
sulfate (SO42-): ≤0.01%

cation traces

Ca: ≤0.005%
Fe: ≤0.001%
Mg: ≤0.002%
Na: ≤0.5%
heavy metals (as Pb): ≤0.001%

SMILES string

[K+].[O-]N=O

InChI

1S/K.HNO2/c;2-1-3/h;(H,2,3)/q+1;/p-1

InChI key

BXNHTSHTPBPRFX-UHFFFAOYSA-M

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General description

Potassium nitrite is an ionic salt that can be used for a variety of chemical reactions, including configuration inversion, substitution of amines via disulfonylamides, nucleophilic aromatic nitration, diazotization, nitrosation, and nucleoside nitration.

Application

Potassium nitrite can be used as:
  • A nucleophile for the nitrosation of diclofenac and diphenylamine into their corresponding N-nitroso derivatives.
  • A nitrous acid source for the diazotization of arylamines.

signalword

Danger

Hazard Classifications

Acute Tox. 3 Oral - Aquatic Acute 1 - Ox. Sol. 2

Storage Class

5.1B - Oxidizing hazardous materials

wgk_germany

WGK 2

flash_point_f

Not applicable

flash_point_c

Not applicable

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On the crystal structure of the trigonal (and cubic) phase of potassium nitrite.
Solbakk JK and Str?mme KO.
Acta Chemica Scandinavica, 23(1), 20-20 (1969)
Ledgard J.
The Preparatory Manual of Explosives., 167-167 (2014)
The reaction of sodium or potassium nitrite with ruthenium salts.
Lederer M and Shukla SK.
Journal of Chromatography A, 6, 20-20 (1961)
Reactions of 4-nitrophthalic anhydride with potassium fluoride and potassium nitrite.
Markezich RL, et al.
The Journal of Organic Chemistry, 42(21), 3435-3436 (1977)
C Spagnuolo et al.
Biochimica et biophysica acta, 911(1), 59-65 (1987-01-05)
The oxidation reaction of human oxyhemoglobin with nitrite is complex and is characterized by a lag period followed by an autocatalytic phase. On the basis of contradictory experimental results, in order to describe the time-course of the reaction, two different
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