YingLong—Water Treatment HEDP 2809-21-4

  • CAS No.: 2809-21-4
  • Type.: Water Treatment
  • Appearance: Clear, water-white to pale yellow solution


Water Treatment HEDP (also named Hydroxyethylidene Diphosphonic Acid, or 1-Hydroxyethylidene-1, 1-diphosphonic acid) is a kind of widely used Water Treatment.

Items of AnalysisStandard                    Analysis Result         
AppearanceClear, water-white to pale yellow solutionClear, water-white to pale yellow solution
Total Active Acid,%58.0-62.060.05%
Phosphorous Acid (as PO33-), %2.0 Maximum1.35%
Phosphoric Acid (as PO43-), %0.8 Maximum0.68%
Chloride (as Cl-), %1.0 Maximum<1.0%
Specific gravity (at 20)1.41-1.461.436
pH, (1% solution 25)1.0-2.01.75
Ca2+ Sequestration, (as CaCO3 mg/g )450 Minimum520mg/g


HEDP/Hydroxyethylidene Diphosphonic Acid is a kind of Water Treatment.  YingLong group is a Leading Chemical Supplier/Manufacturer of Water Treatment for 10 years.
We supply high quality Water Treatment (HEDP/Sodium Chlorite/TCCA/ATMP/PBTC/PAC, etc) in best price. 
Find Quality Water Treatment HEDP/Hydroxyethylidene Diphosphonic Acid from Verified Supplier.

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/Hydroxyethylidene Diphosphonic Acid 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.


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