... one of the main auxiliaries for synthetic detergent, synergist for soap; water softener, tanning agent for leather making, auxiliary for dyeing; As an effective ... , and clean place, avoid moisture. Standard executed: GB9983-88 Item FOR EXPORTINDUSTRIAL GRADEFOOD GRADEAssay (Na5P3O10), %≥94.0 95.0%Phosphorus pentaoxide ...