Etidronic acid
CAS 2809-21-4
EC 220-552-8
Formula C2H8O7P2
MW 206.03 g/mol
Chelating Agents Water TreatmentPersonal Care & CosmeticsTextile, Leather & PaperOil, Gas & Energy Chelation & SequestrationCorrosion InhibitionPreservation & BiocideEmulsification & Dispersion
Description
Etidronic acid (CAS 2809-21-4), also known by the abbreviations EHDP and trade names Dequest 2010 and Dequest Z 010, is a phosphonate-based chelating agent. It carries no assigned E-code and is classified under HS code 29319099.
In water treatment, etidronic acid binds calcium, magnesium, and heavy metal ions to prevent scale formation and inhibit corrosion in cooling and boiler systems. In personal care formulations, it stabilises emulsions and suppresses microbial growth by sequestering metal ions that would otherwise catalyse oxidative degradation.
Etidronic acid is supplied as a light beige powder and is available in technical and cosmetic-grade specifications. It is registered under REACH and compliant with relevant EU chemical regulations. Procurement teams should confirm grade suitability against application requirements, particularly for personal care or textile processing end uses.
In water treatment, etidronic acid binds calcium, magnesium, and heavy metal ions to prevent scale formation and inhibit corrosion in cooling and boiler systems. In personal care formulations, it stabilises emulsions and suppresses microbial growth by sequestering metal ions that would otherwise catalyse oxidative degradation.
Etidronic acid is supplied as a light beige powder and is available in technical and cosmetic-grade specifications. It is registered under REACH and compliant with relevant EU chemical regulations. Procurement teams should confirm grade suitability against application requirements, particularly for personal care or textile processing end uses.
Physical Properties
| Melting Point | 115-117 °C |
| Boiling Point | 578.8±60.0 °C(Predicted) |
| Density | 1.45 (60% aq.) |
| Appearance | light beige powder |
| Color | white |
| Form | Powder |
| Water Solubility | Soluble in water. |
| Vapor Pressure | 0Pa at 25℃ |
| pH | pH (1.7→100, 25℃) : 1.3～1.8 |
| Log P | -3.5 |
Safety & Handling (Learn More)
Danger GHS05 GHS07 GHS08
H
H290H302H314H318H371H413
P
P234P260P264P270P273P280P316P317P321P330P363P390P405P406P501P264+P265P301+P317P304+P340P308+P316P301+P330+P331P302+P361+P354P305+P354+P338
Trade & Regulatory
| HS Code | 29319099 |
| UN Number | 3265 |
| Storage Class | 8A - Combustible corrosive hazardous materials |
| WGK (Germany) | 2 |
Other Names
(1-hydroxy-1-phosphonoethyl)phosphonic acidEHDPDidronel®HEDPDEQUEST 2010Dequest Z 0101-HYDROXYETHYLIDENE-1
Related Products
Raw Materials
Derivatives
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