三氯化铁 iron(III) chloride

物理描述 Physical Description

Ferric chloride is an orange to brown-black solid. It is slightly soluble in water. It is noncombustible. When wet it is corrosive to aluminum and most metals. Pick up and remove spilled solid before adding water. It is used to treat sewage, industrial waste, to purify water, as an etching agent for engraving circuit boards, and in the manufacture of other chemicals.

颜色/状态 Color Form

Hexagonal red by transmitted light, green by reflected light; sometimes appears brownish-black; dark leaflets or plates.

沸点 Boiling Point

About 316 °C

熔点 Melting Point

304 °C

溶解度 Solubility

430 g/kg solution at 0 °C; 480 g/kg solution at 20 °C; 743 g/kg solution at 40 °C

密度 Density

2.90 at 25 °C

蒸汽压力 Vapor Pressure

Vapor pressure at 20 °C: negligible

分解 Decomposition

When heated to decomposition it emits highly toxic fumes of /hydrogen chloride/.

腐蚀性 Corrosivity

Water solutions are acidic and corrosive to most metals.

其他实验性质 Other Experimental Properties

VP: 1 Pa at 118 °C; 100 Pa at 190 °C; 100 kPa at 319 °C