... .white odorless powder 3.50 years factory STPP Sodium Tripolyphosphate 1.SpecificationSpecificationIndustrial grade Food grade Main content, %,≥96.094.090.096 ... .05 Iron, as Fe %≤0.0070.0150.0250.005pH of 1% water solution9.2~10.09.2~10.09.2~10 ... ,as F %≤---0.003 Chloride, as Cl %≤---0.0252. Application: 1). Technical grade: Used in such industries as oil field, paper ...