... sodium, Graham's Salt, Hexasodium metaphosphate, Hexasodium salt, Metaphosphoric acid. Specs: Tech Grade: Total phosphate, as P2O5---------- 68.0% min Inactive phosphate ... Use: 1. Technical grade: Used in such industries as oil field, paper-making, textile, dyeing, petrochemical industry, tanning industry, metallurgical industry and building material ...