Description

Dioctylmonohexylphosphineoxide CAS NO 31160-66-4 is a high-purity organophosphorus compound widely utilized as a specialized extractant and phase transfer catalyst. Its unique molecular structure, featuring mixed alkyl chains, provides an optimal balance of lipophilicity and coordinating power, making it a critical performance additive in advanced separation processes. This chemical is essential for manufacturers and R&D facilities in the hydrometallurgy, fine chemical synthesis, and nuclear fuel reprocessing sectors seeking efficient and selective metal ion recovery.

Application

• Solvent Extraction Agent: A key extractant for the selective separation and purification of rare earth elements, precious metals (e.g., gold, platinum), and transuranic elements from complex aqueous solutions.
• Hydrometallurgical Processing: Used in the recovery of valuable metals like cobalt, nickel, and copper from ores, industrial wastes, and spent catalysts.
• Phase Transfer Catalyst (PTC): Facilitates reactions between reagents in immiscible phases, enhancing reaction rates and yields in organic synthesis, particularly for alkylation and esterification.
• Nuclear Fuel Cycle: Employed in the PUREX and related processes for the reprocessing of spent nuclear fuel, specifically for the separation of uranium and plutonium.
• Chemical Intermediate: Serves as a precursor or ligand in the synthesis of more complex organophosphorus compounds and coordination complexes.
• Analytical Chemistry: Acts as a chelating agent in analytical methods for the pre-concentration and detection of trace metal ions.

Basic Information

Product Name	Dioctylmonohexylphosphineoxide
CAS No.	31160-66-4
Molecular Formula	C22H47OP
Molecular Weight	358.59 g/mol
Synonyms	Monohexyl Dioctyl Phosphine Oxide; Di-n-octylmono-n-hexylphosphine Oxide; Hexyl(dioctyl)phosphine oxide; Phosphine oxide, hexyloctyl-; Dioctyl Hexylphosphine Oxide; DOHPO; C22 Phosphine Oxide Extractant; P-227 (Trade Name Variant)
EINECS	Contact for details

Quality Control

Our Dioctylmonohexylphosphineoxide is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including assay by titration or HPLC and impurity profile analysis, to ensure high chemical purity and consistent performance. Certificates of Analysis (COA) documenting all critical parameters are provided and can be tailored to meet specific customer or regulatory requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents and acids. For long-term storage, consider under an inert atmosphere to maintain optimal purity.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (HPLC/Titration)	≥ 98.0 %
Water Content (Karl Fischer)	≤ 0.5 %
Refractive Index (n20D)	1.455 - 1.465
Density (20°C)	0.88 - 0.92 g/mL

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.