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207799

Sigma-Aldrich

Potassium thiocyanate

ACS reagent, 99%

Synonym(s):
Potassium rhodanide
Linear Formula:
KSCN
CAS Number:
Molecular Weight:
97.18
Beilstein:
3594799
EC Number:
MDL number:
PubChem Substance ID:

Quality Level

grade

ACS reagent

assay

99%

form

crystalline powder

impurities

Iodine consuming substances, passes test
≤0.005% insol. water

color

colorless to white

pH

5.3-8.7 (25 °C, 5%)

mp

173 °C (lit.)

anion traces

chloride (Cl-): ≤0.005%
sulfate (SO42-): ≤0.005%

cation traces

Fe: ≤2 ppm
NH4+: ≤0.003%
Na: ≤0.005%
heavy metals (as Pb): ≤5 ppm

SMILES string

[K]SC#N

InChI

1S/CHNS.K/c2-1-3;/h3H;/q;+1/p-1

InChI key

ZNNZYHKDIALBAK-UHFFFAOYSA-M

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General description

Potassium thiocyanate is an inorganic potassium salt. Phase transitions in potassium thiocyanate (KSCN) have been investigated by X-ray diffraction studies. The order-disorder type transition with respect to the orientation of the thiocyanate ions was identified. Its polarized infrared spectrum has been reported. It participates in the ring-opening of aziridines. The reaction was carried out in the presence of sulfated zirconia to afford the corresponding β-aminothiocyanates.

Application

Potassium thiocyanate may be used in the synthesis of the following:
  • α-Amino nitriles from tertiary amines.
  • Polysubstituted 2-aminothiazoles from vinyl azides.
  • Benzisothiazol-3(2H)-one derivatives from o-bromobenzamides.
  • Diaryl thioethers from aryl halides.
Potassium thiocyanate (KSCN) may be used for the colorimetric quantification of intracellular iron content of the superparamagnetic iron oxide (SPIO) nanoparticles.

Packaging

2.5 kg in poly bottle
100, 500 g in poly bottle

Pictograms

CorrosionExclamation mark

Signal Word

Danger

Hazard Classifications

Acute Tox. 4 Dermal - Acute Tox. 4 Inhalation - Acute Tox. 4 Oral - Aquatic Chronic 3 - Eye Dam. 1

Supplementary Hazards

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

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Certificate of Origin

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