A workhorse liquid-liquid extractant for hydrometallurgical recovery and separation of metals. It is used as a metal extractant in hydrometallurgical solvent-extraction processes, and as a lubricant additive and corrosion inhibitor.
▸Metal extraction: Solvent-extraction reagent for cobalt/nickel and rare-earth separation
▸Hydrometallurgy: Extractant for metal recovery and purification
▸Lubricant additive: Performance additive in lubricating oils
▸Corrosion inhibition: Corrosion inhibitor and antioxidant
Physical Properties
Melting Point
< -60 °C
Boiling Point
155 °C at 0.015 mm Hg
Density
0.977 at 20 °C
Solubility
Soluble in benzene, hexane, and 4-methyl-2-pentanone
Vapor Pressure
0.00000005
Flash Point
196 °C
Safety & Handling
Full SDS available on request
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Transport classification per the UN Model Regulations / 49 CFR 172.101 Hazardous Materials Table. Confirm against the grade-specific SDS (Section 14) before shipping.
HS / Tariff Classification
🌐Harmonized System (HS) Code — 6-digit international heading
2919.90
Chapter 29
Organic chemicals
Heading 29.19
Internationally harmonized (WCO HS)
Subheading 2919.90
6-digit international code — national tariff line adds further digits
Di(2-ethylhexyl) phosphoric acid (CAS 298-07-7) is an organophosphorus acid ester. It is used as a metal extractant in hydrometallurgical solvent-extraction processes, and as a lubricant additive and corrosion inhibitor.
Frequently Asked Questions
What is D2EHPA used for?
Di(2-ethylhexyl) phosphoric acid (D2EHPA, CAS 298-07-7) is an organophosphorus acid ester used mainly as a metal extractant in hydrometallurgical solvent-extraction. It is applied to cobalt/nickel and rare-earth separation, and also functions as a lubricant additive and corrosion inhibitor.
How does D2EHPA work as a solvent-extraction reagent?
D2EHPA is a cation-exchange (acidic) extractant: its phosphoric acid group exchanges its proton for metal cations at controlled pH, transferring them from aqueous to organic phase for downstream stripping and recovery. It is widely used for nickel/cobalt separation and rare-earth purification in hydrometallurgy.
What is the CAS number and formula for D2EHPA?
D2EHPA is CAS 298-07-7, molecular formula C16H35O4P, family acids and salts (a phosphoric ester). Use the CAS for unambiguous specification when requesting material or a CoA.
How is D2EHPA shipped and classified for transport?
For transport it is associated with UN 1902 (di-(2-ethylhexyl)phosphoric acid) and HS code 2919.90 (phosphoric esters and their salts: other). Consult the SDS for the full transport and handling profile before arranging freight.
What is the cost of bulk D2EHPA?
Bulk pricing varies with volume, packaging, and destination. Submit your required quantity and ship-to details for a current quote; each shipment ships with a CoA and SDS.
Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.
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