Functional Roles
Industries Served
Physical Properties
melting_point
198-199
boiling_point
578.8
solubility
1.15e+01 g/L
GHS / SDS Safety
Danger
Irritant
Health Hazard
Corrosive
- H314 (23.9%): Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]
- H318 (92.2%): Causes serious eye damage [Danger Serious eye damage/eye irritation]
- H302: Harmful if swallowed [Warning Acute toxicity, oral]
- H318: Causes serious eye damage [Danger Serious eye damage/eye irritation]
- H302 (55.6%): Harmful if swallowed [Warning Acute toxicity, oral]
- H371: May cause damage to organs [Warning Specific target organ toxicity, single exposure]
- H413 (25.7%): May cause long lasting harmful effects to aquatic life [Hazardous to the aquatic environment, long-term hazard]
- H314: Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]
- H290 (34.6%): May be corrosive to metals [Warning Corrosive to Metals]
Chemical Identity
| CAS Number | 2809-21-4 |
| IUPAC Name | (1-hydroxy-1-phosphonoethyl)phosphonic acid |
| InChI Key | DBVJJBKOTRCVKF-UHFFFAOYSA-N |
| PubChem CID | 3305 |
| INCI Name | ETIDRONIC ACID |
Synonyms & Trade Names
Full Description
Hydroxyethylidene Diphosphonic Acid (HEDP) is a phosphonate compound that provides chelation/sequestration, corrosion inhibition, and scale inhibition properties in industrial applications. This versatile chemical agent is utilized across agriculture, HI&I cleaning, industrial manufacturing, mining, oil & gas, and water treatment industries where metal ion control and surface protection are critical operational requirements.