?????
|
|
????? ??
- ???
- 315 °C
- ??
- 2.056 g/mL at 25 °C (lit.)
- ?? ??
- 870kg/m3
- ???
- 0Pa at 25℃
- ?? ??
- Store below +30°C.
- ???
- 750g/L
- ??? ??
- ??? ?? ? ???
- ??
- ???
- Specific Gravity
- 2.056
- ??????(pH)
- 10 (50g/l, H2O, 20℃)
- ???
- 750g/L(20℃)
- Merck
- 14,7625
- BRN
- 3594798
- ?? ?
- 700-900°C (1000 hPa) Not applicable,(decomposition)
- ?? ??
- NIOSH: IDLH 25 mg/m3
- ???
- ????. ?? ???? ????.
- ??? ?? ??
- ?? ???? - ???
?? ????
?? ????
- 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 ??????
- 590-28-3(CAS DataBase Reference)
??
- ?? ? ?? ??
- ?? ? ???? ?? (GHS)
| ??? ?? | Xn | ||
|---|---|---|---|
| ?? ???? ?? | 22-36 | ||
| ????? | 24/25-26 | ||
| WGK ?? | 1 | ||
| RTECS ?? | GS6825000 | ||
| TSCA | TSCA listed | ||
| HS ?? | 2842 90 80 | ||
| ???? ??? | 11 - Combustible Solids | ||
| Hazard Classifications | Acute Tox. 4 Oral Aquatic Chronic 3 Eye Irrit. 2 |
||
| ?? ?? ??? | 590-28-3(Hazardous Substances Data) | ||
| ?? | LD50 i.p. in mice: 320 mg/kg (Cerami) | ||
| ???? ?? | KE-29091 |
????? C??? ??, ??, ??
??
Potassium cyanate is used as chemical intermediate and as a weed killer. It is also used for the heat treatment of metals.?? ??
Potassium cyanate can be prepared by reacting urea with alkali hydroxide or carbonates at high temperatures.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.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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?? ??
????? ?? ??
???( 328)?? ??
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