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| CAS No.: | 2809-21-4 |
| Formula: | C2h8o7p2 |
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HEDP 60% for Water Treatment CAS 2809-21-4 Scale Corrosion Inhibitor
1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP)
CAS No. 2809-21-4
EINECS: 220-552-8
Molecular Formula: C2H8O7P2
Molecular weight: 206.02
HEDP is an organophosphoric acid corrosion inhibitor. It can chelate with Fe, Cu, and Zn ions to form stable chelating compounds.It can dissolve the oxidized materials on these metals' surfaces. HEDP shows excellent scale and corrosion inhibition effects under temperature 250°C. 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 ch lorine oxidation tolerance are better than that of other organophosphoric acids (salt). HEDP can react with metal ions in water system to form hexa-element chelating complex, with calcium ion in particular. Therefore, HEDP has good antiscale and visible threshold effects. When built together with other water treatment chemicals, it shows good synergistic effects.
Application:
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
| Item | Standard |
| Appearance | Clear, Colorless to pale yellow aqueous solution |
| Odor | Slight to none |
| Active acid % | 60.0 min |
| Phosp horous acid as PO33-(%) | 2.0 max |
| Pho sphoric acid as PO43(%) | 0.8 max |
| Chloride as Cl (ppm) | 100 max |
| Sequestrant value (CaCO3) mg/g as product at PH 11-12 |
500 min |
| PH (1% solution) @20 °C | 2.0 max |
| Density (20ºC),g/cm3 | 1.440 min |
| Iron content (Fe ppm) | 35.0 max |
| Colour (Hazen) | 80 max |
Dalian Sinobio Chemistry Co.,Ltd_was established in 2011 and located in beautiful costal city Dailan Liaoning Province. we can enjoy convenient transportation by all logistic ways. Sinobio cooperated with Dalian university of technology, who has 2 production sites: one located in Lanzhou city , Gan Su province who mainly produce biocides related. Another located in Fuzhou city,Jiangxi province .It was founded in 2013 with abundant financial resources.
As a professional agrochemical and it's intermediates products' supplier, they have excellent teams who focus on product development & design, quality control & inspection and company running. In order to supply the qualified products and services, we have built a modern quality management system which is in strict accordance with international standards. Our factory has got ISO9001&ISO14001 certificates.
Adhering to the business principle of mutual benefits, we have had a good reputation among our customers because of our perfect services, quality products and competitive prices. We warmly welcome customers from at home and abroad to cooperate with us for common success.
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2. Which documents do you support?
Normally speaking, our MOQ is 1 standard package. But we can supply free sample for testing before mass order.
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