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220930

Sigma-Aldrich

Potassium nitrosodisulfonate

Synonym(s):

Dipotassium nitrosodisulfonate, Fremy’s salt

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About This Item

Linear Formula:
(KSO3)2NO
CAS Number:
14293-70-0
Molecular Weight:
268.33
EC Number:
238-219-0
MDL number:
MFCD00010878
UNSPSC Code:
12352000
PubChem Substance ID:
24853200
NACRES:
NA.22

form

powder

Quality Level

100

reaction suitability

reagent type: oxidant

storage temp.

2-8°C

SMILES string

[K+].[K+].[O]N(S([O-])(=O)=O)S([O-])(=O)=O

InChI

1S/2K.H2NO7S2/c;;2-1(9(3,4)5)10(6,7)8/h;;(H,3,4,5)(H,6,7,8)/q2*+1;/p-2

InChI key

IHSLHAZEJBXKMN-UHFFFAOYSA-L

General description

Potassium nitrosodisulfonate is an oxidizing reagent that can be used to convert phenols, naphthols, and anilines to quinones, benzylic alcohols to aldehydes or ketones, and amino acids to α-keto acids. It can also be used for the preparation of heterocyclic quinones and oxidative aromatization.

Application

Potassium nitrosodisulfonate can be used as an oxidizing reagent for the oxidation of:
  • Aromatic amines to their corresponding quinones.
  • Hydroethidine to 2-hydroxyethidium.
  • Tyrosine to o-quinones.

pictograms

FlameExclamation mark
GHS02,GHS07

signalword

Danger

Hazard Classifications

Acute Tox. 4 Oral - Water-react 1

supp_hazards

EUH014

Storage Class

4.3 - Hazardous materials which set free flammable gases upon contact with water

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

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Oxidation of aromatic amines to quinones by iodic acid under microwave irradiation in the presence of montmorillonite K10 and silica gel
Hashemi M, et al.
Monatshefte fur Chemie / Chemical Monthly, 134, 1561-1563 (2003)
M Yoshida et al.
Bioscience, biotechnology, and biochemistry, 65(6), 1444-1446 (2001-07-27)
Bisphenol A was oxidized to monoquinone and bisquinone derivatives by Fremy's salt, a radical oxidant, though salcomine and alkali did not catalyze the oxidation by molecular oxygen. Bisphenol A, bisphenol B, and 3,4'-(1-methylethylidene)bisphenol were converted to their monoquinone derivatives in
Maria-Teresa Türke et al.
Physical chemistry chemical physics : PCCP, 14(2), 502-510 (2011-11-10)
The effectiveness of dynamic nuclear polarization (DNP) as a tool to enhance the sensitivity of liquid state NMR critically depends on the choice of the optimal polarizer molecule. In this study the performance of (15)N labelled Frémy's salt as a
Galit Fichman et al.
Frontiers in bioengineering and biotechnology, 8, 594258-594258 (2021-01-21)
Peptide-based supramolecular gels are an important class of biomaterials that can be used for biomedical applications ranging from drug delivery to tissue engineering. Methodology that allows one to readily modulate the mechanical properties of these gels will allow yet even
T P Holler et al.
Biochemistry, 29(7), 1953-1961 (1990-02-20)
Racemic ovothiol A [(+/-)-1a] and the ovothiol model compound 1,5-dimethyl-4-mercaptoimidazole (DMI, 2) were found to scavange the free radicals Fremy's salt (4) and Banfield' radical (5) much more rapidly than did the thiol antioxidant glutathione. Ovothiol A also scavenges the
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