基本介紹
- 中文名:硒氰酸鉀
- 英文名:Potassium selenocyanate
- 別稱:硒氰化鉀,硒基氰酸鉀
- 化學式:KSeCN
- 分子量:144.9779
- CAS登錄號:3425-46-5
- EINECS登錄號:222-320-1
- 熔點:152-158℃
- 水溶性:可溶
- 外觀:無色晶體
- 分子式:KCNSe
物理性質,化學性質,製備方式,風險術語,安全術語,
物理性質
化學性質
在丙酮中,硒氰酸鉀可以和四乙酸鉛反應,產生氰化硒(I)和硒氰酸鉛(II):
- 4 KSeCN + Pb(CH3COO)4→ 4 CH3COOK + Pb(SeCN)2+ Se2(CN)2
和五氟化碘反應也能得到氰化硒(I):
- 10 KSeCN + 2 IF5→ 10 KF + I2+ 5 Se2(CN)2
和氯氣反應則得到二硒氰酸硒:
- 4 KSeCN + 2 Cl2→ Se(SeCN)2+ Se(CN)2+ 4 KCl
和碘在水中的反應則得不到硒的擬鹵化物:
- KSeCN + 3 I2+ 3 H2O → H2SeO3+ KI + 4 HI + ICN
硒氰酸鉀遇酸分解,放出劇毒的氰化氫氣體:
- KSeCN + HCl → KCl + HCN↑ + Se↓
在有機合成中,硒氰酸鉀可以用來製備硒氰酸烷基酯:
- KSeCN + RX → RSeCN + KX(X=Cl, Br, I)
製備方式
硒溶於熔融氰化鉀或其水溶液,可以得到硒氰酸鉀:
- Se + KCN → KSeCN
風險術語
R33:Danger of cummulative effects.;
R50/53:Very toxic to aquatic organisms,
may cause long-term adverse effects in the aquatic environment.;
安全術語
S20/21:When using do not eat, drink or smoke.;
S28A:After contact with skin, wash immediately with plenty of water.;
S45:In case of accident of if you feel unwell,
seek medical advice immediately (show the label where possible).;
S60:This material and its container must be disposed of as hazardous waste.;
S61:Avoid release to the environment. Refer to special instructions / Safety data sheets.;