Purple crystal petroleum Industrial printing chromic potassium sulfate

1.Character    
Purple red to black eight face cube crystal. In the transmission light is a gem of red. Weathering in the air. When 100 degrees Celsius loses 10 molecular crystal water, 400. Soluble in 4 cold water, 2 parts of boiling water, almost insoluble in ethanol. Its aqueous solution was cold when it was purple, hot green. Relative density (D25) 1.83. Melting point 89. Median lethal dose (rat, vein) 112mg/kg. Irritating. Cr is trivalent, electronic products can only limit the use of one million ppm, people taking (including short-term contact) will make cancer, harmful to the human body.

2.purpose
For the media, soft leather, oil, photographic fixing, bicycle, sewing machine, semi steel watch, flashlight, hardware parts, instruments, such as chrome, chrome textile printing roller. Also used in wood preservation, electrolytic polishing (aluminum cover, aluminum box, aluminum pen) electrolytic production of metal chromium and so on.

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