1-Hydroxy Ethylidene-1,1-Diphosphoric Acid (HEDP) |
CAS Number | 2809-21-4 |
Appearance | Colorless or light yellow transparent liquid |
Assay | 58.0-62.0 |
pH | 2 max |
Iron content | 10 max |
Colour (APHA) | 40 max |
Colour (HAZEN) | 40 max |
Density | 1.4 20Cg/cm3 |
Chloride | 0.01 max |
Packing | 250 kgs |
Use | 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. 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. |
Storage | Storage for ten months in room shady and dry place. |
Phosphoric acid (as PO43)% | 2.0 max |
Organic phosphonic acid (as PO43) % | 0.8 max |
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