- ▸ 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
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.
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Transport classification per the UN Model Regulations / 49 CFR 172.101 Hazardous Materials Table. Confirm against the grade-specific SDS (Section 14) before shipping.
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.
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 206-056-4
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Solutions Using This Product
Process-solution guides on this site that specify this chemistry:
- Heap & Tank Leach Reagents: Acid, Lime, Cyanide & SX (Oil, Gas & Mining)
- Solvent Extraction (SX) Reagents for Hydrometallurgy (Oil, Gas & Mining)
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.
What is the REACH and TSCA regulatory status of Di(2-ethylhexyl) Phosphoric Acid (D2EHPA)?
Di(2-ethylhexyl) Phosphoric Acid (D2EHPA) (CAS 298-07-7) is subject to U.S. TSCA Inventory requirements; supplying it into the EU requires valid REACH registration ((EC) No 1907/2006). RawSource cannot verify a third-party supplier's registrations — buyers should require documented TSCA and REACH compliance for their jurisdiction and volume (EC 206-056-4).