1- Hydroxy Ethylidene-1,1-Diphosphonic Acid

HEDP 50% Aqueous Solution

CAS No: 2809-21-4

Molecular Formula: C₂H₈O₇P₂

Formula Weight: 206.03 g/mol

Structure

HEDP, also known as Etidronic acid or etidronate, is a bisphosphonate used in a wide range of industrial and consumer goods, as shown below.

Industry Uses

● Water treatment products

Ø Scale and corrosion inhibitor

● Pharmacology

Ø Bone scanning agent

● Metal products

Ø Metal and non-metal cleaning agent

● Leather products

Ø Used in the process of tanning and dressing leather

● Dyeing agents

Ø Stabilizer and color fixer

● Cleaning products

Ø Laundry detergents, soaps, de-greasers, spot removers

● Chelating agents

● Intermediates

Specification

Quality Specification
External	Light yellow, transparent aqueous solution
Active content (HEDP)%	50.0 min
Phosphoric acid (as PO43- )%	0.8 max
Phosphorous acid (as PO33-)%	2.0 max
Chloride (as Cl-) μg/g	200.0 max
PH (10g/L aqueous solution)	1.5 - 2.0
Density (20℃) g/cm3	1.36 min
Calcium chelating value (CaCO3), mg/g	450 min
Fe, μg/g	20.0 max

Usage

The dosage of 1–10 mg/L is preferred as scale inhibitor, 10–50 mg/L as corrosion inhibitor, and 1000–2000 mg/L as detergent. Usually, HEDP is also used together with polycarboxylic acid (superplasticizer), in which it acts as reducing agent.

Packaging

● 200L plastic barrel (250kg)

● IBC (1000L)

● Or at customers' requirement

Storage

Store for twelve months in cool and dry place.

Shipping

Ship within 7 days

Get A Quote

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Chemical Safety and Protection

● HEDP is an acid liquid. Harmful if swallowed.

● It may cause severe skin burns and eye damage. Do not contact with skin, eyes and clothes. Wash with plenty of water immediately after contact.

● Avoid inhalation of steam or smoke, keep the container closed, operate at the place with air circulation, and clean thoroughly after operation.

Quality Standard (China): GB/T 26324-2010

Synonyms

Etidronic acid

etidronate

CAS 2809-21-4

HEDP

1-Hydroxyethylidene-1,1-diphosphonic acid

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