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HEDP 60/90% 1-Hydroxyethylidene-1,1-Diphosphonic Acid
RAW MATERIAL
HEDP

HEDP 60/90% 1-Hydroxyethylidene-1,1-Diphosphonic Acid

HEDP 60/90% is a phosphonate-based chelating and sequestration agent used in detergent, cleaning, water-treatment, and selected industrial formulations where mineral control and formulation stability are required.

Chemical Name
1-Hydroxyethylidene-1,1-Diphosphonic Acid
Molecular Weight
206.03 g/mol
Molecular Formula
C2H8O7P2
EINECS
220-552-8
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PRODUCT OVERVIEW

Product Description

HEDP (1-Hydroxyethylidene-1,1-Diphosphonic Acid) is an organophosphonate material used in detergent, cleaning, water-treatment, and industrial formulations where control of metal ions and mineral deposits is important. It provides strong complexing and sequestration performance with several metal ions and can contribute to scale-control and formulation-stability functions in compatible systems. The material is available in different concentration grades. The referenced 60% grade is supplied as a clear, colorless to pale-yellow aqueous solution, while the referenced 90% grade is supplied as a white crystalline powder. Its chemical stability and chelating characteristics make it suitable for a variety of cleaning, detergent, metal-treatment, and industrial process applications.
KEY PROPERTIES

Product Characteristics

Provides effective chelating and sequestration performance for compatible industrial formulations.
Supports control of metal ions and mineral-related deposits in suitable systems.
Offers useful chemical stability across a range of formulated cleaning and industrial applications.
Suitable for detergent and cleaning formulations requiring mineral-control support.
Available in both concentrated liquid and solid grades to suit different formulation requirements.
Can contribute to scale-control and corrosion-management functions in appropriate industrial systems.
TECHNICAL SPECIFICATIONS

Specification Data

Specification HEDP 60% HEDP 90%
Appearance Clear, colorless to pale yellow aqueous solution White crystal powder
Active content (HEDP) by wt % 58.0 - 62.0 90.0 min
Active content (HEDP·H2O) by wt % — 98.0 min
Phosphorous acid by wt % 2.0 max 0.8 max
Phosphoric acid by wt % 0.8 max 0.5 max
Chloride by wt % 0.02 max 0.01 max
pH (1% water solution) 2.0 max 2.0 max
Density (20°C), g/cm³ 1.40 min —
Fe, mg/L 20.0 max 10.0 max
Ca sequestration, mg CaCO3/g 500.0 min —
APPLICATIONS

Typical Uses

✓
Liquid detergent and cleaning formulations
✓
Industrial water-treatment formulations
✓
Cooling-water and process-water treatment systems
✓
Metal-treatment and surface-processing formulations
✓
Industrial cleaning and descaling formulations
✓
Chelating and sequestration applications in compatible industrial processes
✓
Selected textile, paper, and chemical-processing formulations
STORAGE & HANDLING

Handling Guidance

Storage, handling, shelf-life, and safety requirements should follow the current supplier SDS, COA, and applicable industrial regulations. Refer to approved supplier documentation before storage or handling.
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