HEDP CAS 2809-21-4
Product Name: HEDPA
CAS No.: 2809-21-4
Molecular Formula (MF): C2H8O7P2
EINECS No.: 220-552-8
Molecular Weight: 206.02
Purity: 50%, 60%, 90%
Place of Origin: Shanghai, China
Usage: Coating Auxiliary Agents, Electronics Chemicals, Leather Auxiliary Agents, Paper Chemicals, Petroleum Additives, Plastic Auxiliary Agents, Rubber Auxiliary Agents, Surfactants, Textile Auxiliary Agents, Water Treatment Chemicals
Synonyms:HEDP; HEDP(A); HEDPA; Etidronic Acid;1-Hydroxy Ethylidene-1,1-Diphosphonic Acid;Hydroxyethylidene-1,1-diphosphonicacid (HEDP);1-Hydroxyethylidenediphosphonic Acid;Hydroxyethylidene Diphosphonic Acid (HEDP);1-Hydroxy-1,1-Ethanediyl Ester;Oxyethylidenediphosphonic Acid (OEDP);Phosphonates Antiscalants, Corrosion Inhibitors and Chelating Agents
Usage: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.
Safety Protection:Acidity. Avoid contact with eye and skin, once contacted, flush with water.
Properties:
HEDP is a kind of scale and corrosion inhibitor which belongs to organic phosphonic acid. It can form stable complexes with iron, copper, zinc and other metal ions, and can also dissolve the metal surface oxide. Under 250 ºC condition, HEDP can still play a good corrosion and scale inhibition effect.
HEDP has good chemical stability under high pH value, hard to be hydrolyzed, and hard to be decomposed under ordinary light and heat conditions. Its acid/alkali and chlorine oxidation tolerance show better than that of other organic phosphonic acid (salt) acids (salt).
HEDP can react with metal ions in water system to form hexa-element chelating complex, especially with calcium ions. Therefore, HEDP has good anti-scale and visible threshold effects. When used in combination with other water treatment chemicals, it shows ideal synergistic effects.
HEDP solid state is a high purity product, suitable for cold winter areas; Because of its high purity, it is especially used as the cleaning agents in electronics industry, and additives in daily chemicals.
Applications:
HEDP is widely used as scale and corrosion inhibitor in industrial circulating cooling water systems of electric power, chemical industry, metallurgy, chemical fertilizer, and also in medium or low pressure boilers, oilfield water injection and oil pipeline.
Besides these applications, HEDP can also be used as cleaning agent of metal and nonmetal in the textile industry, as peroxide stabilizer and fixing agent in bleaching and dyeing industry, as complexing agent in cyanide free electroplating industry, as the carrier of radioactive elements in pharmaceutical industry, and so on.
Specification
| Item |
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 - )% |
1.0 max |
0.8 max |
| Phosphoric acid (as PO43 - )% |
0.6 max |
0.5 max |
| Chloride (as Cl - )% |
0.01 max |
0.01 max |
| pH (1% water solution) |
2.0 max |
2.0 max |
| Density (20ºC)g/cm3 |
1.40 min |
- |
| Fe, mg/L |
10.0 max |
5.0 max |
| Colour APHA (Hazen) |
10.0 max |
- |
| Ca sequestration (mg CaCO3/g) |
500.0 min |
- |
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Shanghai Lonwin Chem is a leading manufacturer and supplier of chemicals in China.We develop,produce and distribute high
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Storage:
keep container tightly closed in a dry and well-ventilated place.
Packing:25kgs/bag or 25kgs/drum
| Weight |
Packing |
| <25KG |
By foil-alum bag/pap/bottle |
| ≥25kg |
Package: 25kg/drum/bag or as your request |
Packaging & Delivery
Company Profile
Lonwin Chemical Industry Group. is a company committing to contract synthesis and production of photoinitiators,
fluorocarbon surfactants, indicators, intermediates and APIs.Our company has ISO and REACH international
certification, in Jiangsu, Anhui and other places with decades of cooperation of OEM processing plants, to provide a
more solid support for the customized production service of special chemicals.
Now, our products are well sold in North America, Europe, Japan, South Korea and the Middle East, and customers
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