DiSodium Phosphate 1.anhydrous/dodecahydryte 2. water soluble 3. best quality and ... water gesso into things, 250 when °C decomposed into coke sodium. Disodium specificationitemsresultAppearancepowder or fine granularAssay, %98.0 min.Arsenic %0 ... additive, buffering agent ,solder, tanning agent, emulsifier, texturizer, etc. Disodium Phosphate