CAS No. 7788-99-0
Solubility in water: 20 g in 100 ml water at 20 ° C. Upon heating the solution turns green when cooled gradually becomes purple in color. Crystals in the air weathered, covered with purple bloom
density 1.83 g / cm3,
Melting point 89 ° C.
Solubility in water at 20 ° C 18.3%
Are used in artisanal fur dressing as a tanning agent in the manufacture of emulsions, as well as tanning and tanning solutions fixer.