... change suspension into solution, slightly alkaline, without causticity. 2, Usage: Used as main auxiliary of synthetic wash, soap synergistic agent, water softener, ... leather pre-tanning agent, dye auxiliary agent, and ... 0.015 pH of 1% water solution 9.2-10.0 2. Food grade Main content, %: 94.0 P2O5%; 57.0 Water ...