1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP)
Product Description
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP)
Product Name | 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP)
| Molecular Structure |
| |
Other Name | 1-Hydroxyethylidene-1,1-diphosphonic acid;1-hydroxyethane 1,1-diphosphonic acid;1-Hydroxyeth;Etidronic acid;Etidronsaeure;Hydroxyethanediphosphonic acid;Acetodiphosphonic acid;EHDP;HEDP;Etidronate;1-Hydroxyethane-1,1-diphosphonic acid;Turpinal SL;Etidronic acid monohydrate (HEDP);Oxyethylidenediphosphonic acid; | |||
CAS No | 2809-21-4 | |||
Molecular Formula | C2H8O7P2 | |||
Check-Point | Specification | |||
Appearance | Clear, Colorless to pale yellow aqueous solution | White crystal powder | ||
Active content (HEDP), % | 58-62 | 90.0 min | ||
Active content (HEDP·H2O), % | - | 98.0 min | ||
Phosphorous acid (as PO33-), % ≤ | 2.0 | 0.8 | ||
Phosphoric acid (as PO43-), % ≤ | 0.8 | 0.5 | ||
Chloride (as Cl-), ppm ≤ | 100.0 | 100.0 | ||
pH (1% water solution) ≤ | 2.0 | 2.0 | ||
Density (20℃), g/cm3 | 1.43-1.47 | - | ||
Fe, mg/L ≤ | 20.0 | 10.0 | ||
Color APHA (Hazen) ≤ | 40.0 | - | ||
Ca Sequestration (mg CaCO3/g) ≥ | 500.0 | |||
Packing：
HEDP liquid: 200L plastic drum,IBC(1000L),customers’ requirement.
HEDP solid: 25kg/bag,customers’ requirement.
Product Usage：
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. 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.