What Is HEDP? Uses, Dosage & Properties
HEDP (1-hydroxyethylidene-1,1-diphosphonic acid) is an organophosphonic-acid scale and corrosion inhibitor and chelating agent that resists high temperature and chlorine, making it a workhorse for cooling water, low-pressure boilers and metal cleaning.
Properties
HEDP chelates calcium, iron, copper and other metal ions, prevents CaCO₃ scale by threshold inhibition, and stays stable in oxidizing and high-temperature conditions better than many phosphonates.
Uses & dosage
- Cooling water scale & corrosion control: ~5–20 ppm.
- Low-pressure boiler water and metal cleaning/passivation.
- Detergent builder and chelant in textile/peroxide bleaching.
VCYCLETECH supplies HEDP and its sodium salts in bulk.
Frequently asked questions
What is HEDP used for?
As a scale and corrosion inhibitor in cooling water and boilers, a chelating agent for metal ions, and a stabilizer in peroxide bleaching.
What is the dosage of HEDP?
Typically 5–20 ppm as product in cooling water, adjusted to hardness and cycles of concentration.
About the manufacturer
VCYCLETECH is a China-based manufacturer of water treatment chemicals — antiscalants, scale & corrosion inhibitors, coagulants, flocculants, biocides, dispersants and paper chemicals — ISO 9001 / 14001 / 45001 certified, with a COA on every batch and OEM/ODM service. See our quality & certifications.
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