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Detergents
HEDP (1-Hydroxyethylidene-1,1-Diphosphonic Acid)
Formula:
C₂H₈O₇P₂
GOST/CAS:
CAS 2809-21-4
HEDP (Etidronic acid) is a highly efficient organic phosphonic acid chelating agent and scale inhibitor. The product is a white or off-white crystalline powder, excellently soluble in water, alkalis, acids, and alcohols. Due to its unique ability to form stable complexes with calcium, magnesium, iron, and other metal ions over a wide pH range, HEDP is indispensable in water treatment, household detergents, cosmetics, and the textile industry.
Applications
Water Treatment & Industrial Osmosis: Used as a highly effective scale inhibitor in circulating cooling water systems, boilers, steam generators, and desalination plants. It prevents the precipitation of carbonates and sulfates.
Household Chemicals & Cosmetics: Acts as a stabilizer in formulations for laundry detergents, bleaches, liquid soaps, and shampoos. It protects components from decomposition by binding heavy metal ions, thereby extending product shelf life.
Textile & Pulp and Paper Industries: Applied to stabilize peroxide solutions during fabric and pulp bleaching, as well as to remove trace metals before dyeing, which prevents spot formation.
Oil Production & Agriculture: Used to prevent scale deposition in oil wells and as a base for producing highly efficient microfertilizers (chelated complexes) to stimulate plant growth.
Key Advantages
High Chelating Capacity: HEDP effectively binds hardness ions and heavy metals, preventing the formation of poorly soluble precipitates even at high temperatures.
Stability and Purity: The substance is manufactured under strict technological standards, ensuring minimal impurity content, high active ingredient concentration, and a stable solubility profile.
Thermal and Hydrolytic Stability: The product retains its properties at temperatures above 100°C and is resistant to acid or alkaline hydrolysis, making it an excellent choice for harsh industrial conditions.
Environmental Safety & Biodegradability: When properly dosed and disposed of, it does not disrupt wastewater treatment facilities. It exhibits lower environmental toxicity compared to older inorganic polyphosphates.
Storage & Transportation
- Store in dry, cool, and light-protected warehouse premises in tightly closed original packaging, away from alkalis and strong oxidizing agents.
- Recommended temperature range: from -10°C to +30°C. Avoid exposure to moisture, as the product is hygroscopic.
- Avoid direct sunlight. Use personal protective equipment when handling (the product has an acidic reaction).
- Transportation is possible by all types of covered transport in compliance with the temperature regime. The product is classified as a moderately hazardous substance (Hazard Class 3). Shelf life is 1 year from the date of manufacture.
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Technical Specifications
Appearance
White or off-white crystalline powder
Molecular Weight
~206.03 g/mol
Active Ingredient (Assay)
98.0% – 101.5%
Chloride Content
≤ 1.0%
pH (1% aqueous solution)
1.5 – 2.5
Heavy Metals Content (Pb)
≤ 10 ppm
Supply info
- Industrial multi-layer bags or kraft drums with a double polyethylene inner liner at 10 kg / 25 kg.
- Small packaging in hermetic aluminum bags or canisters at 1 kg / 5 kg (for laboratory and pilot-industrial series).