1-Hydroxy Ethylidene-1,1-Diphosphoric Acid (HEDP)702

1-Hydroxy Ethylidene-1,1-Diphosphoric Acid (HEDP)702

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1-Hydroxy Ethylidene-1,1-Diphosphoric Acid (HEDP)

CAS Number2809-21-4
AppearanceColorless or light yellow transparent liquid
pH2 max
Iron content10 max
Colour (APHA)40 max
Colour (HAZEN)40 max
Density1.4 20ºC)g/cm3
Chloride0.01 max
Packing250 kgs
UseUsed 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. The dosage of 1-10mg/L is preferred as scale inhibitor, 10-50mg/L as corrosion inhibitor, and 1000-2000mg/L as detergent. Usually, HEDP is used together with polycarboxylic acid.
StorageStorage for ten months in room shady and dry place.
Phosphoric acid (as PO43)%2.0 max
Organic phosphonic acid (as PO43) %0.8 max