【CAS】2809-21-4
Alias: 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid, Dequest:2010
Molecular formula: C2H8O7P2 Relative molecular mass: 206.02
1. Property and Purpose
The product is colorless crystalline powder, soluble in water and easy to absorb moisture. It is easy for transportation and is suitable for cold condition. The product is an organophosphoric acid corrosion inhibitor, which can chelate with Fe, Cu, and Zn ions to form stable chelating compounds. It can dissolve the oxidized materials on these metal’s surfaces. HEDP shows excellent scale and corrosion inhibition effects under temperature of 250℃.
HEDP is used as scale and corrosion inhibition in circulating cool water system, oil field and low-pressure boilers in fields such as electric power, chemical industry, metallurgy, fertilizer, etc. In light woven industry, HEDP is used as detergent for metal and nonmetal. In dyeing industry, HEDP is used as peroxide stabilizer and dye-fixing agent; in non-cyanide electroplating, HEDP is used as chelating agent.
It belongs to the high-purity product so that it is especially suitable for the detergent in the electronic industry and the daily chemical additives.
II. Quality Index
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Items
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Index
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Appearance
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White powder solid
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Active content %
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90.0
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| Active content(HEDP•H2O) % |
98.0
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Phosphoric acid content(as PO43-) %
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0.50
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Phosphorous content(as PO33- ) %
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0.50
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Chloride (as Cl-%
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0.10
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Fe (as Fe) (ppm)
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5.0
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PH (1% aqueous solution)
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2.0
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III. Package and Storage
The product is packed in plastic woven bags with inner liner polyethylene bag. The net weight of each bag is 25kg and the weight can also be determined in accordance with the requirements of users. It can be stored for one year in shady and dry place under room condition.
IV. Safety Protection
This product is in acidity. Avoid contact with eye, skin or clothes. Once contacted, flush it with large amount of water.
