Specifications:
Test item Specification 
Reagent grade Pharmaceutical grade 
Appearance Conform Conform 
Assay [Al2(SO4)3·18H2O]/% ≥99.0 ≥99.0 
Clarify degrees test Conform Conform 
Water insoluble/% ≤0.02 ≤0.05 
Chloride (Cl)/% ≤0.002 ≤0.01 
Ammonium salt (NH4)/% ≤0.005 ≤0.02 
Sodium (Na) /% ≤0.005 ≤0.015 
Ferric (Fe)/% ≤0.003 ≤0.01 
Heavy metal (Pb)/% ≤0.001 ≤0.002 
Alkali metal and alkaline metal /% ≤0.25 ≤0.5 
USE:
used for the manufacturing of  wood –pulp,paper,alum,aluminium salt, printing ink,lubricant,boiler cleaning agent,satin white,oilcloth,linoleum,ceramics,for sizing paper,clarifying fats and oils,tanning white leather,and water purification as deodorization and decolourizer in petroleum refining,as filtering medium water-proofing agent,and as mordant in dyeing.