... powder (3):Food Grade/Tech Grade (4):White sheet or powder (5):High quality service Sodium Hexametaphosphate(SHMP)Chemical formula ... Fe etc. and is a good water treatment chemical.Uses:Used in industries of oil fields, paper production, textile, dyeing, ... , disperser and high temperature adhesive; In food industry it used as an additive, nourishing agent, quality improver, pH regulator, metal ions ...