Assay: 50% Min.
Phosphorous Acid: 0.3% Max.
Iron: 3 ppm Max.
Sodium: 40 ppm Max.
Chloride: 40 ppm% Max.
Sulfate: 100 ppm Max.
Calcium: 100 ppm Max.
Copper: 1 ppm Max.
Arsen: ....

Ca( H2PO2) 2 Content 98% Min.
Pb2+ Content ( % ) 0.001% Max.
As Content ( % ) 0.000% Max.
Ba2+ Content ( % ) 0.005% Max.
Water Insoluble substance 0.5%
Acidity Qualified

NaH2PO2.H20 % 101-102%
Na2HPO3 % 0.3% Max.
Ca2+ ( % ) 0.002% Max.
Fe2+ ( % ) 0.0001% Max.
SO42- ( % ) 0.003% Max.
Cl- ( % ) 0.003% Max.
PH 6 - 8

H3PO2 Content 65% Min.
H3PO3 Content 0.5% Max.
Fe2+ Content 8 PPM Max.

a. Appearance: a colorless liquid
b. Molecular formula: H3PO2
c. Molecular weight: 66
d. Proportion: 1.21-1.24
e. CAS NO.: 6303-21-5
H3PO2 Content 30-32% Min.
H3PO3 Content....

a. Appearance: a colorless liquid
b. Molecular formula: H3PO2
c. Molecular weight: 66
d. Proportion: 1.21-1.24
e. CAS NO.: 6303-21-5
H3PO2 Content 50% Min.
H3PO3 Content 0.3....