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207810

Sigma-Aldrich

Potassium cyanide

ACS reagent, ≥96.0%

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About This Item

Linear Formula:
KCN
CAS Number:
151-50-8
Molecular Weight:
65.12
Beilstein:
3593645
EC Number:
205-792-3
MDL number:
MFCD00011397
UNSPSC Code:
12352302
PubChem Substance ID:
329752024
NACRES:
NA.21
Assay:
≥96.0%
grade:
ACS reagent
form:
granular
solubility:
water: soluble(lit.)
Pricing and availability is not currently available.

grade

ACS reagent

Quality Level

200

Assay

≥96.0%

form

granular

pH

11.5 (20 °C, 20 g/L)

mp

634 °C (lit.)

solubility

water: soluble(lit.)

anion traces

S2-: ≤0.003%
SCN-: passes test
chloride (Cl-): ≤0.5%
phosphate (PO43-): ≤0.005%
sulfate (SO42-): ≤0.04%

cation traces

Fe: ≤0.03%
Na: ≤0.5%
Pb: ≤2 ppm

SMILES string

[K]C#N

InChI

1S/CN.K/c1-2;

InChI key

YUZRZFQHUCKACF-UHFFFAOYSA-N

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General description

Potassium cyanide is a colorless hygroscopic compound. Its crystals exhibit cubic crystal system. It can be prepared by reacting hydrogen cyanide with potassium hydroxide.[1] It participates in benzoin condensation reaction.[2]

Application

Potassium cyanide may be employed in the following studies:
  • As a reducing agent in the colorimetric determination of amino acids.[3]
  • Preparation of ferrocylacetonitrile, via reaction with methiodide of N,N-dimethylaminomethylferrocene.[4]
  • Synthesis of O-acetylcyanohydrins.[5]
  • Cyanation of aldimines via asymmetric Strecker-type reactions in the presence of chiral phase-transfer catalysts to form α-amino nitriles.[6]
  • Metal-catalyzed addition of cyanide to 1,2-epoxides to form β-hydroxy nitriles.[7]

Signal Word

Danger

Hazard Classifications

Acute Tox. 1 Oral - Acute Tox. 2 Dermal - Acute Tox. 2 Inhalation - Aquatic Acute 1 - Aquatic Chronic 1 - Met. Corr. 1 - STOT RE 1

Target Organs

Thyroid

Supplementary Hazards

EUH032

Storage Class Code

6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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Certificates of Analysis (COA)

Lot/Batch Number
MKCX1904
MKCV9048
MKCV6716
MKCT4737
MKCV4670

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Easy direct stereo-and regioselective formation of ?-hydroxy nitriles by reaction of 1, 2-epoxides with potassium cyanide in the presence of metal salts.
Chini M, et al.
Tetrahedron Letters, 32(36), 4775-4778 (1991)
Asymmetric Strecker reaction of aldimines using aqueous potassium cyanide by phase-transfer catalysis of chiral quaternary ammonium salts with a tetranaphthyl backbone.
Ooi T, et al.
Journal of the American Chemical Society, 128(8), 2548-2549 (2006)
Rui Liu et al.
International journal of molecular sciences, 21(11) (2020-06-11)
Pentatricopeptide repeat (PPR) protein comprises a large family, participating in various aspects of organellar RNA metabolism in land plants. There are approximately 600 PPR proteins in maize, but the functions of many PPR proteins remain unknown. In this study, we
Eagleson M.
Concise Encyclopedia Chemistry, 18-18 (1994)
Reaction of the Methiodide of N, N-Dimethylaminomethylferrocene with Potassium Cyanide to Form Ferrocylacetonitrile1.
Lednicer D, et al.
The Journal of Organic Chemistry, 23(5), 653-655 (1958)
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Questions

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  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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