Application:

1 Technical grade : Used in such industries as oil field , paper-making, textile, dyeing, petrochemical industry , tanning induetry and builing material industry , and used as a water softening agent in solution for printing , dyeing , and boiler, as diffusant in papermaking , retarding agent , floating agent , dispersing medium high temperature agglomerant , tetergent and soil analytical  chemical reagent .
2 Food grade : Mainly used as additive agent .