Complaint
| Identification | ||
| Name | 1-Hydroxyethylidene-1,1-diphosphonic acid | |
| Synonyms | 1-Hydroxyethane-1,1-diphosphonic acid; 1-Hydroxyethylidenedi(phosphonic acid); Dequest 2010; Etidronic acid; HEDP | |
| Molecular Structure | ||
| Molecular Formula | C2H8O7P2 | |
| Molecular Weight | 206.03 | |
| CAS Registry Number | 2809-21-4 | |
| EINECS | 220-552-8 | |
| Properties | ||
| Density | 1.45 (60% aq.) | |
| Items | Index | |
| Appearance | Clear, Colorless to pale yellow aqueous solution | White crystal powder |
| Active content (HEDP)% | 60.0 min | 90.0 min |
| Active content (HEDP·H2O)% | - | 98.0 min |
| Phosphorous acid (as PO33-)% | 2.0 max | 0.8 max |
| Phosphoric acid (as PO43- )% | 0.8 max | 0.5 max |
| Chloride (as Cl-)% | 0.02 max | 0.01 max |
| pH (1% water solution) | 2.0 max | 2.0 max |
| Density (20ºC)g/cm3 | 1.40 min | - |
| Fe, mg/L | 20.0 max | 10.0 max |
| Ca sequestration (mg CaCO3/g) | 500.0 min | |
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.
HEDP liquid: 200L plastic drum,IBC(1000L),customers' requirement.
HEDP solid: 25kg/bag,customers' requirement.
Storage for twelve months in room shady and dry place.
Acidity, Avoid contact with eye and skin, once contacted, flush with water.
