HEDP (1-Hydroxyethylidene-1,1-Diphosphonic Acid) Supplier in Malaysia
- Also known as
- Etidronic Acid
- 1-Hydroxyethylidene-1,1-Diphosphonic Acid
- 1-Hydroxyethane-1,1-Diphosphonic Acid
- Hydroxyethylidene Diphosphonic Acid
HEDP supplier for water-treatment, industrial cleaning and process-chemistry buyers in Malaysia. HEDP is 1-hydroxyethylidene-1,1-diphosphonic acid, also known as etidronic acid, 1-hydroxyethane-1,1-diphosphonic acid and hydroxyethylidene diphosphonic acid (CAS 2809-21-4, C2H8O7P2). It is an organophosphonate scale inhibitor and metal-ion chelant used in cooling, boiler and process water.
Commercial supply is led by HEDP 60% aqueous acid solution, the usual trade concentration for dosing and formulation, with technical grade HEDP acid offered at other strengths when a programme or recipe specifies them. This page covers the free acid; disodium and tetrasodium HEDP salts are related but distinct products and should be named separately on the enquiry.
Water treaters use HEDP to control hardness scale and sequester iron in open and closed circuits. Cleaning formulators add it to descalers and industrial cleaners, while manufacturing and textile processes may use it for metal-ion control and peroxide stabilisation.
Send the required concentration or grade, application, target specification, quantity and delivery location with your enquiry. Availability, packing, documentation and delivery timing are confirmed with the quotation.
- CAS number
- 2809-21-4
- Formula
- C2H8O7P2
- Grade
- technical, industrial
- Appearance
- colourless to pale yellow aqueous liquid, or white crystalline solid according to form
HEDP grades and forms
We supply several forms to suit different formulating and dosing setups. If you need a size that is not listed, ask us.
| Grade | Form | Assay | Typical use | Packing |
|---|---|---|---|---|
| HEDP 60% aqueous acid solution | clear aqueous liquid | commonly around 60% active acid, or as specified | Standard commercial concentration for cooling-water and boiler-water scale inhibition packages, metal-ion sequestration and industrial cleaning formulations that dose or blend HEDP acid solution. | Confirm the required pack format with the quotation. |
| Technical grade HEDP acid | aqueous solution or solid acid according to specification | concentration and purity confirmed against the required specification | Water-treatment programmes, peroxide stabilisation and process chelation where a technical HEDP acid grade is named at a buyer-specified strength rather than a fixed 60% solution. | Confirm the required pack format with the quotation. |
How to buy HEDP from ChemTrade
Request a quote for HEDP
Use the form below to request a quotation. You can also email sales@chemtrademalaysia.com or send us a message on WhatsApp.
Specifications
| Parameter | Value | Method |
|---|---|---|
| Chemical name | 1-hydroxyethylidene-1,1-diphosphonic acid (HEDP; etidronic acid) | — |
| CAS number | 2809-21-4 | — |
| Molecular formula | C2H8O7P2 | — |
| Appearance | colourless to pale yellow aqueous liquid, or white crystalline solid according to form | — |
| Typical commercial strength | commonly around 60% active acid as aqueous solution; confirm assay against the required specification | — |
| Solubility | freely soluble or miscible in water as the acid solution | — |
HEDP applications
Safety and handling
- Classification
- corrosive
Store sealed in a cool, dry place away from incompatible substances and strong bases. Acidic liquid; use suitable acid-resistant handling equipment, gloves and eye protection, and follow the safety data for the quoted grade.
Common questions about HEDP
What is HEDP and what does the full name mean?
HEDP is 1-hydroxyethylidene-1,1-diphosphonic acid, also called etidronic acid, 1-hydroxyethane-1,1-diphosphonic acid and hydroxyethylidene diphosphonic acid (CAS 2809-21-4, formula C2H8O7P2). It is an organophosphonate used mainly as a scale inhibitor and metal-ion chelant in industrial water treatment and related process chemistry.
Is HEDP the same as tetrasodium HEDP or HEDP-Na4?
No. This page covers HEDP free acid, commonly supplied as a 60% aqueous solution. Disodium HEDP (HEDP-Na2) and tetrasodium HEDP (HEDP-Na4) are related sodium salts with different pH, solubility and dosing behaviour. Name the free acid or the salt clearly so the correct material is quoted.
Which HEDP concentration should I request?
The most common commercial form is about 60% active HEDP acid as an aqueous solution for water-treatment and cleaning packages. Other technical strengths or solid acid forms may be specified by programme or formulation. State the target assay and application rather than assuming a single fixed grade.
What is HEDP used for in cooling and boiler water?
HEDP is dosed as a threshold scale inhibitor and chelant. It helps control calcium carbonate and related deposits, sequesters iron and other metals, and is often blended into multi-component cooling or boiler programmes. Suitability depends on water chemistry, metallurgy and the full treatment package, so describe the system with the enquiry.
What specifications should a buyer provide for HEDP?
State free-acid versus sodium-salt form, active concentration (for example 60%), appearance preference, and any impurity, iron, chloride or programme limits required by the water-treatment or cleaning formulation. An existing specification sheet helps match the quotation more closely.
What details are needed for an HEDP price enquiry?
Provide the concentration or grade, application, target specification, quantity and delivery location. Mention preferred packing and any product documents required so the quotation can cover the full requirement.