310484
Potassium nitrite
ACS reagent, ≥96.0%
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About This Item
Empirical Formula (Hill Notation):
KNO2
CAS Number:
Molecular Weight:
85.10
NACRES:
NB.24
PubChem Substance ID:
UNSPSC Code:
12352302
EC Number:
231-832-4
MDL number:
Assay:
≥96.0%
Grade:
ACS reagent
Form:
powder or crystals
Solubility:
water: soluble (718.8 g/l at 25 °C (77 °F))
grade
ACS reagent
Quality Level
assay
≥96.0%
form
powder or crystals
impurities
≤0.01% insolubles
pH
7-10 (25 °C, 50 g/L)
mp
350 °C (dec.) (lit.)
solubility
water: soluble (718.8 g/l at 25 °C (77 °F))
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
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.
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signalword
Danger
hcodes
Hazard Classifications
Acute Tox. 3 Oral - Aquatic Acute 1 - Ox. Sol. 2
Storage Class
5.1B - Oxidizing hazardous materials
wgk
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)
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)