| Identification | More | [Name]
Potassium cyanate | [CAS]
590-28-3 | [Synonyms]
CYANIC ACID POTASSIUM SALT
POTASSIUM CYANATE
aerocyanate
aerocyanateweedkiller
alicyanate
bonidekrabcrabgrasskiller
bulpur
d&pdoubleocrabgrasskiller
ded-weedcrabgrasskiller
dupontpccrabgrasskiller
greencrosscrabgrasskiller
kaliumcyanat
kocn
millerp.c.weedkiller
p.c.80crabgrasskiller
potassiumcyanate(kcno)
potassiumcyanate(kocn)
potassiumisocyanate
weedanolcyanol
weedonecrabgrasskiller | [EINECS(EC#)]
209-676-3 | [Molecular Formula]
CKNO | [MDL Number]
MFCD00011411 | [Molecular Weight]
81.12 | [MOL File]
590-28-3.mol |
| Chemical Properties | Back Directory | [Appearance]
white powder | [Melting point ]
315 °C
| [density ]
2.056 g/mL at 25 °C(lit.)
| [vapor pressure ]
0Pa at 25℃ | [storage temp. ]
Store below +30°C. | [solubility ]
750g/l | [form ]
Crystalline Powder and Chunks | [color ]
White | [Specific Gravity]
2.056 | [PH]
10 (50g/l, H2O, 20℃) | [Stability:]
Stable. Incompatible with acids. | [Water Solubility ]
750 g/L (20 ºC) | [Merck ]
14,7625 | [Boiling point ]
700-900°C (1000 hPa) Not applicable,(decomposition) | [BRN ]
3594798 | [Exposure limits]
NIOSH: IDLH 25 mg/m3 | [LogP]
0.3 at 20℃ | [Uses]
Herbicide, manufacture of organic chemicals
and drugs, treatment of sickle-cell anemia.
| [CAS DataBase Reference]
590-28-3(CAS DataBase Reference) | [EPA Substance Registry System]
590-28-3(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
Xn | [Risk Statements ]
R22:Harmful if swallowed. | [Safety Statements ]
S24/25:Avoid contact with skin and eyes . | [WGK Germany ]
1
| [RTECS ]
GS6825000
| [TSCA ]
Yes | [HS Code ]
28429019 | [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. | [Hazardous Substances Data]
590-28-3(Hazardous Substances Data) | [Toxicity]
LD50 i.p. in mice: 320 mg/kg (Cerami) |
| Hazard Information | Back Directory | [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,
| [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]
Notclassified | [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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