Overview
Di-2-ethylhexyl hydrogen phosphate , commercially known as D2EHPA , is an organophosphoric acid extractant used across hydrometallurgy, lubricant formulation, and industrial separation processes.
It functions primarily as a selective metal extractant and chelating agent, enabling the recovery and purification of target metals from aqueous streams. This compound is identified by CAS 298-07-7 .
In mining and hydrometallurgy, it is the extractant of choice for recovering cobalt, nickel, zinc, and rare earth elements from leach solutions via solvent extraction circuits.
Petroleum refiners use it to remove trace metal contaminants from process streams, protecting downstream catalysts and improving product quality in various industrial applications.
In lubricant and metalworking fluid formulations, it acts as a corrosion inhibitor and anti-wear additive, particularly in systems handling non-ferrous metals during manufacturing.
It also functions as a carrier solvent in liquid-liquid extraction systems designed for uranium and vanadium recovery. The product is supplied as a clear to pale yellow liquid.
It is typically available in drum and IBC quantities suited to industrial-scale extraction operations. Technical grade is the standard offering, with purity ranging from 95% to 99%.
Buyers sourcing for hydrometallurgical circuits typically require low water content and controlled acid value specifications to ensure optimal performance in their specific chemical processes.
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Physical Properties
| Melting Point | -50 °C |
| Boiling Point | 48 °C (12 mmHg) |
| Density | 0.973 g/cm³ @ Temp: 25 °C |
| Flash Point | >230 °F |
| Appearance | clear colorless to light yellow liquid |
| Color | Colorless |
| Form | Liquid |
| Water Solubility | slightly soluble |
| Vapor Pressure | <0.1 hPa (20 °C) |
| Refractive Index | n 20/D 1.443(lit.) |
| pH | 3 (< 1g/l, H2O) |
| Log P | 2.88 at 25℃ |
Safety & Handling
Danger GHS05 GHS07 Hazard Statements H302 Harmful if swallowed H312 Harmful in contact with skin H314 Causes severe skin burns and eye damage H315 Causes skin irritation H318 Causes serious eye damage H332 Harmful if inhaled H402 Harmful to aquatic life H412 Harmful to aquatic life with long lasting effects H302+H312 Harmful if swallowed or in contact with skin Precautionary Statements P260 Do not breathe dust/fume/gas/mist/vapours/spray. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash … thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P271 Use only outdoors or in a well-ventilated area. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P316 Get emergency medical help immediately. P317 Get emergency medical help. P321 Specific treatment (see … on this label). P330 Rinse mouth. P363 Wash contaminated clothing before reuse. P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P301+P317 Get emergency medical help. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P332+P317 Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P301+P330+P331 Rinse mouth. Do NOT induce vomiting. P302+P361+P354 IF ON SKIN: Take off immediately all contaminated clothing. Rinse skin with water/shower. P305+P354+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| HS Code | 29190090 |
| UN Number | 1902 |
| ADR Class | 8 |
| Packing Group | III |
| Storage Class | 8A - Combustible corrosive hazardous materials |
| WGK (Germany) | 1 |
Other Names
Related Products
Chemical Properties
- CAS Number
- 298-07-7
- EC Number
- 206-056-4
- Mol. Weight
- 322.42
- HS Code
- 29190090
- Category
- Chelating Agents