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     Phosphorous Acid 

    98.5%  99%  phosphorous Acid 

    Molecular Formula:H3PO3
    Molecular Weight: 82.00
    CAS Number: 13598-36-2

    EINECS NO.:237-066-7

    Properties
    Phosphorous acid is a colorless crystal, relative Density: 1.651 (21.1 °C);
    melting Point: 73.6 °C; moiling Point: 200 °C (Decomposes); easily soluble in
    water and alcohol.
    It can be slowly oxidized to phosphoric acid in the air. When heated to 180 °C,
    it can be decomposed into phosphoric acid and phosphine (highly toxic). As a
    dibasic acid, it has slightly stronger acidity than phosphoric acid. Phosphorous
    acid has strong reducibility and can easily reduce Ag+ to metal silver. It can
    also reduce sulfuric acid to sulfur dioxide. It is hygroscopic and has strong
    hygroscopy.
    Specification
    Item Classy article Grade A
    Appearance White Crystal
    Main Content (As H3PO3) (%) ≥ 99.0 98.5
    Iron Content (As Fe) (%) ≤ 0.001 0.005
    Chloride Content (As CL) (%) ≤ 0.001 0.005
    Sulfate Content (As SO4) (%) ≤ 0.008 0.01
    Phosphate Content (As PO4) (%) ≤ 0.2 0.6
    80%Liquid Phosphorous Acid (%) Colorless transparent liquid

    Applications
    Phosphorous acid is mainly used in the production of phosphates, synthetic
    fibers and organophosphorus pesticides, etc.. It is also used in producing high
    performance water treating agent ATMP.

     

    Packaging
    Net 25kg, 500kg or 1000kg in woven bag lined with double layers of polythene
    bag".


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