SUNCHEM

1-Hydroxyethane-1,1-diphosphonic Acid

1-Hydroxyethane-1,1-diphosphonic acid (HEDP) is one of the most widely used organophosphonate scale and corrosion inhibitors for industrial water treatment applications. Its excellent stability in a wide pH range and strong chelation of calcium, iron, and zinc ions make it an essential component in circulating cooling…

2809-21-4
  • Lot COA with every shipment
  • Samples for your trials
  • Technical support for your trial
CAS No.2809-21-4
FormulaC2H8O7P2
Synonyms(1-Hydroxyethylidene)bisphosphonic acid;(1-Hydroxyethylidene)diphoshonic acid;(Hydroxyethylidene)diphosphonic acid;1,1,1-Ethanetriol diphosphonate;1-Hydroxyethane-1,1-bisphosphonic acid;1-Hydroxyethane-1,1-diphosphonate;1-Hydroxyethanediphosphonic acid;1-Hydroxyethylidene-1,1-bisphosphonate;1000SL;Acetodiphosphonic acid;Acide etidronique [INN-French];Acidum etidronicum [INN-Latin];BRN 1789291;Dequest 2010;Dequest Z 010;EHDP;Ethane-1-hydroxy-1,1-diphosphonic acid;Etidronate;Ferrofos 510;Hydroxyethane-1,1-diphosphonic acid;Oxyethylidenediphosphonic acid;Phosphonic acid, (1-hydroxyethylidene)di-;RP 61;Turpinal SL;UNII-M2F465ROXU;Phosphonic acid, P,P'-(1-hydroxyethylidene)bis-;1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP);HT-101 HEDP;

Product overview & key benefits

1-Hydroxyethane-1,1-diphosphonic acid (HEDP) is one of the most widely used organophosphonate scale and corrosion inhibitors for industrial water treatment applications. Its excellent stability in a wide pH range and strong chelation of calcium, iron, and zinc ions make it an essential component in circulating cooling water, boiler water, and oil field water treatment programs. SUNCHEM supports international buyers with 1-Hydroxyethane-1,1-diphosphonic Acid sourcing from qualified Chinese producers, with quality documentation, export coordination, and logistics support.

Technical specifications

PropertyReference value
Density2.114 g/cm3
Melting Point198~199 °C
Boiling Point578.8 °C at 760 mmHg
Flash Point303.8 °C
Appearancelight beige powder
Risk Codes37/38-41
Safety26-39
Transport InformationUN 3265

Existing product reference data. Confirm the specification of the offered grade before ordering.

Applications

Scale inhibitor for calcium carbonate and calcium sulfate
Corrosion inhibitor in industrial cooling water systems
Boiler water treatment formulation ingredient
Oil field water injection scale control
Sequestrant for metal ions in cleaning formulations
Desalination system antiscalant
Electroplating bath stabilizer

From first email to approved supply

01

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02

Review the documents

Review the producer TDS, a recent COA and SDS with the quotation.

03

Trial a sample

Run your own tests against your current grade.

04

Lock the spec

Put approved lot limits into the contract and check every COA against them.

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