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Products
Product name: 1-HydroxyEthylidene-1,1-DiphosphonicAcid
CAS: 2809-21-4
Dequest:2010
Molecular formula: C2H8O7P2
Molecular Weight: 206.02
Structure
I. Product performance
It is organic phosphoric acid scale inhibityor; can form complex compounds with iron, copper and zinc ions; has good scale inhibiting property at 250℃; stable at high pH-value conditions.
II. Spec. HG/T3537-1999
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Item
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Index
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Appearance
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Colorless or light yellow transparent liquid
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Active component (HEDP)％ ≥
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50.0 60.0
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Phosphite (PO33-)% ≤
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2.0 2.0
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Phosphoric acid (PO43-)% ≤
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0.3 0.3
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Chloride (Cl-)% ≤
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1.0 1.0
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pH-value (1% aqueous solution) ≤
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2 2
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Density (20℃)g/cm3 ≥
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1.34 1.40
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Calcium chelating value mg/g ≥
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450 500
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Iron ions ppm ≤
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10 10
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III. Application scope and using method
This product is widely used in the scale and corrosion inhibiting of circulating cooling water systems in power, chemical, metallurgy, fertilizer and other industries. Used as metal and non-metallic detergent in textile industry, peroxide stabilizer and fixing agent in bleaching and dyeing industry, and complexing agent in non-cyanide electroplating. As scale inhibitor, the general concentration is 1~10mg/L; corrosion inhibitor, 10~50mg/L; detergent 1000~2000mg/L. Usually used in conjunction with polycarboxylate scale inhibitor and dispersant.
IV. Packing & storage
Plastic drum, 30kg or 250kg, or according to customer requirements. Stored in dry and cool room. Shelf life 10 months.
V. Safety: This product is acidic. Avoid contact with eyes and skin. Once splashed, wash with plenty of water.