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Phosphorous acid or Phosphoric acid CAS 7664-38-2 is a kind of colorless viscous liquid which is widely used in food industry as a great food additive and in the industries. Phosphorous acid is an important raw material of fertilizer production including almost all kinds of Phosphorous fertilizers. Also, for the pharmaceutical industry, Phosphorous acid is alse applied to produce its some materials.
Specification:
Food Grade:
Purity (H3PO4) 85% min
As 0.00005%max
F 0.001% max
Heavy Meta(as Pb) 0.0005% max
H3PO3 0.012% max
Technical Grade
Purity (H3PO4) 85% min
Cl 0.0005% max
SO4 0.005% max
Fe 0.002% max
As 0.005% max
Heavy Meta(as Pb) 0.001% max
Color 30 max
LCD Grade
Purity (H3PO4) 85% min
Fe 300 ppb max
As 200 ppb max
Na 150 ppb max
Ca 150 ppb max
Mg 150 ppb max
Pb 100 ppb max
Cu 100 ppb max
K 100 ppb max
Ni 100 ppb max
Al 100 ppb max
Mn 100 ppb max
Bi 100 ppb max
Co 100 ppb max
Sr 100 ppb max
Color 10 max.
Application
For food industry, as a acidity regulator and nutrition agent for yeast, Phosphoric acid of food grade could be applied for flavors, canned food and light drinks as well as used in wine brewery as a nutrients source for yeast to prevent the reproduction of useless bacteria.
For technical grade industry, phosphoric acid could be used to produce variety of phosphates, electrolyte treatment liquids or chemical treatment liquids, refractory mortar with phosphoric acid and inorganic coheretant. It is also used as a catalyst, drying agent and cleaner. In coating industry it is used as a rust-proof coating for metals.