Product Alias ??twelve water Disodium; twelve disodium hydrogen phosphate Na2HPO4-12H2O Molecular Weight 358.14 Characteristics: colorless transparent monoclinic prismatic crystal, relative density of 1.52, in the air easily weathered, easy to lose five molecules crystal water and the formation of water-7 (Na2HPO4.7H2O). Soluble in water, insoluble in alcohol. Aqueous solution was slightly alkaline reaction (0.1-1N solution PH about 9.0). Lose crystal water at 100 ℃ from anhydrous, 250 ℃ decomposed into sodium pyrophosphate. Product Use: Used as boiler water softener, fabric, wood and paper paper flame retardants, glaze and coat medicine. For the production of detergents, cleaning agents and the print version of mordant dyeing. In dyeing industry as hydrogen peroxide bleaching stabilizer, rayon filler (enhanced strength and elasticity of silk). Sodium pyrophosphate and the manufacture of other phosphate materials, is monosodium glutamate, erythromycin, penicillin, streptomycin, and the production of waste water treatment products such as training agents. Also used in electroplating, Rou leather. Index Name First grade Qualified disodium hydrogen phosphate (Na2HPO4? 12H2O) content% ≥ 97.0 96.0 Sulfate (as SO4) content% ≤ 0.7 1.2 Chloride (as CI) content% ≤ 0.05 0.10 Water insoluble% ≤ 0.05 0.10 Arsenic (as As)% ≤ 0.005 - Fluoride (F0)% ≤ 0.05 - PH value of 9.0 ± 0.2 9.0 ± 0.2