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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:
12352302
PubChem Substance ID:
329753627
NACRES:
NB.24

grade

ACS reagent

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.

Signal Word

Danger

Hazard Statements

H272,H301,H400

Hazard Classifications

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

Storage Class Code

5.1B - Oxidizing hazardous materials

WGK

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Ledgard J.
The Preparatory Manual of Explosives., 167-167 (2014)
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)
Potassium Nitrite
Moriarty R, et al.
e-EROS Encyclopedia of Reagents for Organic Synthesis (2001)
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)
A new nitrite ionic liquid (IL-ONO) as a nitrosonium source for the efficient diazotization of aniline derivatives and in-situ synthesis of azo dyes
Valizadeh H, et al.
Dyes and Pigments, 92, 1138-1143 (2012)
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