... .82 Standard: GB1624-79 Appearance: White powder Sodium Hexametaphosphate (SHMP) Industrial Grade (1) Total phosphate, as P2O5: 68. ... Iron, as Fe: 0.05% max.Usage: Sodium Hexametaphosphate (SHMP) tech grade used in industries of oil fields, paper production, textile ... medium and high temperature agglomerant. Usage: Sodium Hexametaphosphate (SHMP) food grade mainly used as additive agent, pH adjusting ...