Appearance: colorless or slightly yellow liquid
Solubility: miscible in water 
H3PO2 content: 50% min.
H3PO3:  0.5% max.
Na: 1.0% max.
Fe: 0.005% max.
Sulfate and chloride: 0.05% max.
Application: used as reducing agent, analysis reagent etc.
Package: 50kg or 250kg per plastic drum, or IBC drum