46 visiting now: 17 China China flag 13 USA USA flag 4 India India flag 4 Sweden Sweden flag 1 Thailand Thailand flag 1 Ukraine Ukraine flag 1 Israel Israel flag 1 Bosnia and Herzegovina Bosnia and Herzegovina flag 1 Moldova Moldova flag 1 Romania Romania flag 1 France France flag 1 Germany Germany flag

Hedp - China

price: contact company for price

1-Hydroxy Ethylidene-1, 1-Diphosphonic Acid (HEDP)

CAS No. 2809-21-4

Molecular Formula: C2H8O7P2 Molecular weight: 206.02

Structural Formula:


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℃. 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 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.

The solid state of HEDP is crystal powder, suitable for usage in winter and freezing districts. Because of its high purity, it can be used as cleaning agent in electronic fields and as additives in daily chemicals.


items index

Appearance Clear, Colorless to pale yellow aqueous solution White crystal powder

Active content (HEDP)% 58.0-62.0 90.0min

Phosphorous acid (as PO33-)% 1.0 max 0.8 max

Phosphoric acid (asPO43- )% 0.6 max 0.5 max

Chloride (as Cl-) ppm 100.0 max 100.0max

pH (1% solution) 2.0 max 2.0 max

Density (20℃)g/cm3 1.43-1.47 -

Fe,mg/L 10.0 max 5.0 max

Colour APHA (Hazen) 30.0 max -

Acetic acid % 0.5 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.

Package and Storage:

HEDP liquid: 200L plastic drum, IBC(1000L), customers’ requirement.

HEDP solid: 25kg/bag, customers’ requirement.

Storage for ten months in room shady and dry place.

Safety Protection:

Acidity, Avoid contact with eye and skin, once contacted, flush with water.


For any questions and needs please contact us below

Company Contact:

  • Phone: 86-632-5796776

  • Address: Zhongtian Road, Shizhong district, Zaozhuang city,, Zaozhuang, China

  • Email: Email

Published date: September 7, 2012 -

  • Business Description: Youbang Chemicals Co., Ltd. ( YBC), founded in 1999, is one of the largest Chinese manufacturers of polymers, biocides, phosphonates and other water treatment chemicals.

    YBC has acquired its Certification for ISO9001 Quality Management System (QMS), Certification for ISO9001 14001 Environmental Management System (EMS) and Certification for OHSAS 18001 Occupational Health and Safety Assessment Series.

    YBC has also been granted network access license for water treatment chemicals for electric power systems and SINOPEC.

    YBC boasts of stable product quality, reliable product performance, complete product line of water treatment chemicals, customized products, rapid response, timely delivery and perfect post sales service. With a total staff number of 300, an annual capacity of 50,000 MT and an annual turnover of $65 Million, YBC provides its products through reliable agencies and distributors worldwide.

    YBC is dedicated to manufacture of high quality water treatment chemicals for extensive applications in numerous fields of industrial water treatment, including but not limited to: oilfields, boilers, cooling towers, geothermal power plants, and reverse osmosis systems, etc.

    YBC is always committed to R&D and innovation. YBC s pilot and bench test facilities allow for various performance evaluation tests on a basis of customized formulations.

    YBC, your professional supplier and partner of water treatment chemicals in China.

Related listings

  • Mold Temperature Contaroller Unit
    Mold Temperature Contaroller Unit
    Chemicals - Water Treatment - S.U.G(WUXI)MACHINERYLIMITED CO.,LTD - China - September 7, 2012 - contact company for price

    Choice of some mold temperature controller manufacturers in Germay, France, Japan and Austria as their OEM partner. Mold Temperature Contaroller Unit Thank you in advance for your consideration

  • Detergent
    Chemicals - Water Treatment - Hongye Chemical Company LTD - China - September 7, 2012 - contact company for price

    Hongye Chemical Co., Ltd. produce 150000MT Sodium Percarbonate per year. Sodium Percarbonate offers many of the same functional benefits as liquid hydrogen peroxide. It dissolves into water rapidly to release oxygen and provides powerful cleaning, bl...

  • Aluminum Sulfate Manfacturing Plant
    Aluminum Sulfate Manfacturing Plant
    Chemicals - Water Treatment - ucci - Egypt - September 7, 2012 - contact company for price

    Service to setup aluminum sulfate plant 1- production process know how 2- equipments details for production line 3- raw material specefication and sources 4- procedure for final quality product 5- startup assistance Aluminum Sulfate Manfacturing Plan...

Safe Trade Tips

  • Ask for business references and check them
  • Use a payment method that offers better protection for all such as Letters of credit and verified professional escrow services. Avoid payments in advance such as money transfers
  • Verify their business via their local Chamber of Commerce
  • Search the internet using their website address, their business name, their phone and fax numbers, and their email addresses to see if you can find any feedback about them.
  • Get to know more about scams to avoid: Internet Crime Complaint Center - International Financial Scams
  • This site is never involved in any transaction, and does not handle payments, shipping, guarantee transactions, provide escrow services, or offer "buyer protection" or "seller certification"