Items
Index
Appearance
Colorless to pale yellow transparent liquid
Active component (as acid) %
21.2-24.6
Active component (as salt) %
31.0-36.0
chloride (as Cl-)% ≤
4.0
Total phosphoric acid (PO43-)%
16.8-18.8
Phosphorous acid(as PO33-)%
2.0
Iron ( as Fe2+ ) μg/g ≤
35
Density (20℃)g/cm3
1.21-1.31
pH (1% water solution)
6.0-8.0