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    Affirmation, from unremitting efforts and pursuit

    HS-311 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP)

    Product name
    HS-311 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP)
    CAS No.
    2809-21-4
    Alias
    HEDPA
    Molecular Formula
    C2H8O7P2
    Molecular Weight
    206.02
    Structural Formula
    Properties & Use
    It is an organic phosphoric acid series antiincrustation corrosion inhibitor. It has good stability in high pH-value conditions; has good resistance to acids/alkali and oxidation.
    HEDP is widely used for electrical power, chemical engineering, metallurgy and chemical fertilizer industries.
    Specifications
    Conform to HG/T 3537-1999
    Item
    Details
    HG/T 3537-1999
     
    Appearance
    colorless or light yellow transparent liquid
    white powdered solid
    Active ingredient (HEDP)%≥
    50.0       60.0
    89
    Phosphorous acid(PO33-)% ≤
    2.0        2.0
    0.8
    Phosphoric acid (以PO43-)% ≤
    0.8        0.8
    0.5
    Chloride (Cl-)% ≤
    0.01        0.01
    0.01
    pH-value (1%aqueous solution) ≤
    2          2
    2
    Density(20℃)g/cm3
    1.34       1.40
    ——
    Cacium chelating value mg/g
    450        500
    ——
    Iron (2+) content mg/L ≤
    10         10
    5
    Active ingredient (HEDP H2O)%≥
    ——
    98
    Packing & Storage
    HEDP liquid: in plastic drum, 30kg/drum or 250Kg; HEDP solid: in plastic woven bag lined with PE film, net wt.25kg/bag, or upon users' demand. Stored in cool and draugthty place. Shelf life is 12 months.
    Safety Protection
    Avoid contact with skin and eyes; wash with plenty of water.

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