硫氰酸铬铵,俗称
雷氏盐,是一种
配位化合物,化学式为NH4[Cr(NH3)2(SCN)4],主要用作汞的显示剂和沉淀剂,氨基酸的沉淀剂等。
化学结构:铬原子为八面体配位,被六个氮原子包围。NH3
配体是反式的,Cr-NCS基团是线性的。通常形成一水合物。其结构图见图片“雷氏盐结构图”。
S22:Do not breathe dust.
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection.
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed.
R32:Contact with acids liberates very toxic gas.
R36/37/38:Irritating to eyes, respiratory system and skin.