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Phosphorous Acid, Crystal

Item Premium Grade First Grade Second Grade
Appearance Pure White Crystal White Crystal White Crystal
Assay 99.0%min 99.0%min 98.5%min
Iron (Fe) 0.0001%max 0.0005%max 0.002%max
Chloride (C) 0.0005%max 0.0005%max 0.002%max
Sulphate (SO4) 0.0001%max 0.0005%max 0.002%max
Phosphate (PO4) 0.05%max 0.1%max 0.2%max
Plumbum (Pb) 0.0001%max 0.0001%max
Cadmium (Cd) 0.0001%max 0.0001%max
The test of 70% concentration water
Ftu0.1max Ftu 1max
Apha 3max Apha 10max
Caution: second grade phosphorous acid is made from by-products of dimethyl phosphite.