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Phosphoric acid

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产品描述
Product name Phosphoric acid
English name PHOSPHOROUS ACID
Molecular formula H3PO3
CAS Number 13598-36-2
Molecular weight 82.00
United Nations code 2834
Physicochemical properties Phosphorous acid is a colorless crystal. The relative density is 1.651 (21.1oC), the melting point is 73.6oC, and the boiling point is 200oC (decomposition). It is easily soluble in water and alcohol, slowly oxidized to orthophosphoric acid in air, and decomposed into orthophosphoric acid and phosphine (very toxic) when heated to 180 °C. Phosphorous acid is a dibasic acid. The acidity of phosphorous acid is slightly stronger than that of phosphoric acid. It has strong reducibility and is easy to reduce Ag ions into metallic silver, which can reduce sulfuric acid to sulfur dioxide. Phosphorous acid also has strong hygroscopicity and deliquescence.
Product Usage It is mainly used to produce phosphite, synthetic fiber and organophosphorus pesticides, and is also used to produce high-efficiency water treatment agent ATMP.
Main indicators
Test items Superior product First grade
Main content (in terms of H3PO3), %≥ 99.0 99.0
Iron (in terms of Fe), %≤ 0.001 0.003
Chloride (in terms of CL), %≤ 0.01 0.02
Sulfate (SO4), %≤ 0.008 0.01
Phosphate (based on PO4sub>), %≤ 0.2 0.6
Exterior Pure white crystal White crystals
70% aqueous solution test 70% Colorless and transparent Colorless, transparent and free of impurities
Packaging, storage and transportation The woven bag is lined with plastic bags or kraft paper lined with plastic bags. Net weight 25kg, 500kg or 1000kg.

 

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