Potassium cyanate Chemical Properties

Melting point:

315 °C

Density 

2.056 g/mL at 25 °C (lit.)

bulk density

870kg/m3

vapor pressure 

0Pa at 25℃

storage temp. 

Store below +30°C.

solubility 

750g/l

form 

Crystalline Powder and Chunks

Specific Gravity

2.056

color 

White

PH

10 (50g/l, H2O, 20℃)

Water Solubility 

750 g/L (20 ºC)

Merck 

14,7625

BRN 

3594798

Boiling point:

700-900°C (1000 hPa) Not applicable,(decomposition)

Exposure limits

NIOSH: IDLH 25 mg/m3

Stability:

Stable. Incompatible with acids.

Cosmetics Ingredients Functions

SKIN CONDITIONING - EMOLLIENT
HAIR CONDITIONING
SKIN CONDITIONING

InChI

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

InChIKey

GKKCIDNWFBPDBW-UHFFFAOYSA-M

SMILES

[K+].[O-]C#N

LogP

0.3 at 20℃

CAS DataBase Reference

590-28-3(CAS DataBase Reference)

EPA Substance Registry System

Potassium cyanate (590-28-3)

Safety Information

Hazard Codes 

Xn

Risk Statements 

22-36

Safety Statements 

24/25-26

WGK Germany 

1

RTECS 

GS6825000

TSCA 

TSCA listed

HS Code 

2842 90 80

Storage Class

11 - Combustible Solids

Hazard Classifications

Acute Tox. 4 Oral
Aquatic Chronic 3
Eye Irrit. 2

Hazardous Substances Data

590-28-3(Hazardous Substances Data)

Toxicity

LD50 i.p. in mice: 320 mg/kg (Cerami)

MSDS

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Potassium cyanate Usage And Synthesis

Chemical Properties

Potassium cyanate, KCNO, white solid, soluble, formed along with lead metal by reaction of potassium cyanide and lead monoxide solids upon heating. Source of cyanate.

Chemical Properties

Potassium cyanate, KOCN,is colorless,water soluble crystals. Used as an herbicide and for the manufacture of drugs and organic chemicals,

Uses

Potassium cyanate is used as an inhibitor to prevent sickling of erythrocytes and has potential use as a treatment for sickle-cell anemia. Potassium cyanate is also used as a reagent to carbamylate proteins.

Uses

Potassium cyanate is used as chemical intermediate and as a weed killer. It is also used for the heat treatment of metals.

Uses

Herbicide, manufacture of organic chemicals and drugs, treatment of sickle-cell anemia.

Definition

ChEBI: Potassium cyanate is a cyanate salt and a one-carbon compound. It has a role as a herbicide.

General Description

Potassium cyanate can be prepared by reacting urea with alkali hydroxide or carbonates at high temperatures.

Flammability and Explosibility

Not classified

Safety Profile

Poison by intraperitoneal route. Moderately toxic by ingestion. Causes irritation of the gastrointestinal tract. An herbicide. It is said to be slowly metabolized in the body to cyanide but does not have high toxicity of cyanides. When heated to decomposition it emits very toxic fumes of CNand K2O.

Synthesis

ErnerW synthesized potassium cyanate from potassium carbonate and urea, using sulfoxide or sulfone as a solvent [9]. The invention is characterized by the use of solvents with strong solvency for urea and potassium carbonate, such as methyl ethyl sulfoxide, diethyl sulfoxide, etc. ErnerW, in his patent example, dissolved 5 mol of potassium carbonate and 13 mol of urea in 4.0 of methyl ethyl sulfoxide, the reaction was heated and stirred with nitrogen, and the temperature of the reaction was increased to 180??C in 1h, with ammonia, 24.0c478 water vapour, Carbon dioxide overflow, after 0.25h, the temperature rises to 195 ?? C. At this time, the reaction can be terminated when a sample is taken from the reactor and tested with barium nitrate for the absence of carbonate, the product is cooled to room temperature, filtered, and washed with anhydrous ethanol to obtain 10 mol portions of potassium cyanate, yield 90%.

Purification Methods

Common impurities include ammonia and bicarbonate ion (from hydrolysis). Purify it by preparing a saturated aqueous solution at 50o, neutralising with acetic acid, filtering, adding two volumes of EtOH and keeping for 3-4hours in an ice bath. (More EtOH can lead to co-precipitation of KHCO3.) Filter, wash it with EtOH and dry it rapidly in a vacuum desiccator (P2O5). The process is repeated [Vanderzee & Meyers J Chem Soc 65 153 1961].

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