2-Ethylhexyl acid phosphate
CAS 12645-31-7
EC 235-741-0
Formula C8H18O.xH3O4P
MW 532.63 g/mol
Organic Acids Mining & MetalsWater TreatmentLubricants & Metalworking Chelation & SequestrationCorrosion InhibitionpH Regulation & Buffering
Description
2-Ethylhexyl acid phosphate (CAS 12645-31-7) is a mono- and diester mixture of phosphoric acid with 2-ethylhexanol, commercially available under trade names including AP 8, Phoslex A-8, Sipophos 2EHP, JP 508, and 2EHAPO4. It carries no E-code designation and is classified under HS code 2919 90 00.
In mining and hydrometallurgy, it functions as a selective extractant, binding target metal ions through phosphate coordination to separate them from leach solutions. In metalworking and lubricant formulations, it adsorbs onto metal surfaces via its acidic phosphate group, forming a protective film that inhibits corrosion and reduces friction under load.
This product is supplied as a technical-grade clear liquid and falls under REACH regulation (EC 235-741-0), requiring an up-to-date Safety Data Sheet for EU procurement. Standard packaging formats include drums and IBC containers, with documentation available to support supplier qualification and regulatory compliance workflows.
In mining and hydrometallurgy, it functions as a selective extractant, binding target metal ions through phosphate coordination to separate them from leach solutions. In metalworking and lubricant formulations, it adsorbs onto metal surfaces via its acidic phosphate group, forming a protective film that inhibits corrosion and reduces friction under load.
This product is supplied as a technical-grade clear liquid and falls under REACH regulation (EC 235-741-0), requiring an up-to-date Safety Data Sheet for EU procurement. Standard packaging formats include drums and IBC containers, with documentation available to support supplier qualification and regulatory compliance workflows.
Physical Properties
| Boiling Point | >180°C (1013 hPa) decomposes |
| Density | 1,01 g/cm 3 |
| Flash Point | >100°C |
| Color | Colorless to Light yellow to Light orange |
| Form | clear liquid |
| Water Solubility | 5.95μg/L at 20℃ |
| Vapor Pressure | 0.085Pa at 25℃ |
| Refractive Index | 1.4400-1.4460 |
| pH | 2.3 (10g/l, H2O, 20°C) (as an emulsion) |
| Log P | 2.18 |
Safety & Handling (Learn More)
Danger GHS05 GHS07
H
H302H314H318
P
P260P264P270P280P316P317P321P330P363P405P501P264+P265P301+P317P304+P340P301+P330+P331P302+P361+P354P305+P354+P338
Trade & Regulatory
| HS Code | 2919 90 00 |
| WGK (Germany) | 1 |
Other Names
AP 8JP 5082EHAPO4Phoslex a 8Sipophos 2EHPHordaphos MDAHBeycostat A 081OCTYL PHOSPHATEOCTYL ACID PHOSPHATE
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