... ,glass,papermaking,inorganic salts,dyestuff,alcohol fibre, tanning... Sodium Sulfate PH 6-8Synonyms: Disodium sulfate; sodium sulfate anhydrous; sulfuric acid, disodium ... . 0.20 MAX.whiteness % 85 MIN. 82 MIN. 82 MIN.PH-value 6-7.5 6-8 9-11Partickle size: Passed ... on 100 mesharound 60-65%around 60-65% not required SSA PH 6-8