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HEDP (Etidronic acid) CAS 2809-21-4

Assay: 60%; 99%

Appearance: Transparent liquid (60%) or White crystal powder (90%)

Capacity: 18000MT per year

Packaging: 250kg plastic drum;25kg bag

Sample: available


HEDP (Etidronic acid) Quick Details

Chemical Name: HEDP (Etidronic acid)

Another Name: Etidronic acid

Synonyms: 1-Hydroxyethylidene-1,1-diphosphonic acid

CAS No.: 2809-21-4

Molecular Formula: C2H8O7P2

Chemical Structure:HEDP Structure

Molecular weight: M=206.03

EINECS No.:220-552-8

Appearance: Transparent liquid (60%) or White crystal powder (90%)

HEDP (Etidronic acid) Typical Properties

Appearance Transparent liquid (60%) or White crystal powder (90%)
Active content(HEDP)% 90.0min
Active content(HEDP.H2O)% 98.0min
Chloride(as Cl-)% 50max
PH (1% solution) 2.0max
Fe,mg/L 5.0max
Phosphoric acid(as PO3³‾) 0.8max
Phosphoric acid(as PO4³‾) 0.5max

HEDP (Etidronic acid) Application 

1. 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..

2. In light woven industry, HEDP is used as detergent for metal and nonmetal. In dyeing industry, HEDP is used as peroxide stabilizer and dye-fixing agent;

3. 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.

4. Usually, HEDP is used together with polycarboxylic acid.

5. This product is the main material for cyanide-free plating. It is formulated into a cyanide-free copper plating solution, and the copper plating layer directly on the steel has good bonding strength. The coating is smooth and the color is good. The general dosage is 60% and the content is 100-120 ml/L. The amount of copper sulfate is 15-20 g/L. In addition, before plating, the plated parts are immersed in the 1% to 2% solution of the product, so that the plated parts are turned into an activated state, and then electroplating can further improve the effect.

What is the difference between HEDP solids and liquids?

HEDP solids are high purity products suitable for use in cold winters.

HEDP (Etidronic acid) Packaging and Storage

Packaging: 25KG/ bag. Compound cowhide paper bag, lined.

HEDP (Etidronic acid) Packaging and Storage

In a 250 kg net Plastic Drum, IBC drum can also be used as required.

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