... Hydrogen Phosphate / DSP 2.Disodium Phosphate / DSP 98% 97% 3.CAS No.:7558-79-4,100028-24-7, 10039-32-4 Disodium hydrogen ... , and paper, also as water softening agent for boiler, food additive, buffering agent, solder, tanning agent, in baking powder ... ; as food additive, emulsifier, nutritional supplement, fermentation auxiliary, adhesive. etc. ...