Description

Dioctylphosphinic Acid CAS NO 683-19-2 is a high-purity organophosphorus compound widely recognized as a highly effective extractant and catalyst intermediate. Its unique chemical structure provides excellent selectivity and stability in complex separation and synthesis processes. This product is essential for industries involved in metal recovery, polymer stabilization, and the production of advanced lubricant additives.

Application

• Solvent Extraction Agent: A key extractant for the separation and purification of rare earth elements, cobalt, nickel, and other strategic metals from aqueous solutions.
• Catalyst Precursor: Serves as a crucial intermediate in the synthesis of organophosphorus catalysts used in polymerization and other organic transformations.
• Stabilizer Intermediate: Used in the manufacture of high-performance stabilizers for polymers, including PVC, to enhance thermal and UV resistance.
• Lubricant Additive Synthesis: A building block for creating extreme-pressure (EP) and anti-wear additives for advanced industrial and automotive lubricants.
• Surface Treatment Agent: Employed in formulations for metal surface treatment and corrosion inhibition.
• Pharmaceutical Intermediate: Utilized in the synthesis of certain active pharmaceutical ingredients (APIs) and fine chemicals.

Basic Information

Product Name	Dioctylphosphinic Acid
CAS No.	683-19-2
Molecular Formula	C₁₆H₃₅O₂P
Molecular Weight	290.42 g/mol
Synonyms	Di-n-octylphosphinic Acid; Bis(octyl)phosphinic Acid; Phosphinic acid, dioctyl-; DOPA; O,O-Dioctylphosphinic Acid; Dioctylphosphinous Acid; Octylphosphinic Acid, Dioctyl Ester; HDEHP analog (partial)
EINECS	211-675-6

Quality Control

Our Dioctylphosphinic Acid is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including assay, identity confirmation, and impurity profiling, to ensure it meets the high standards required for industrial and research applications. Certificates of Analysis (COA) detailing purity, physical properties, and test results are provided with each shipment and are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and a strong acid/organic solvent; ensure containers are kept tightly sealed to exclude moisture and are compatible with the chemical. Keep away from heat, sparks, open flames, and incompatible materials such as strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow viscous liquid
Identification (IR)	Conforms to structure
Assay (Titration)	≥ 95.0%
Water Content (KF)	≤ 0.5%
Acid Value	Contact for details
Density (20°C)	~0.92 g/mL
Refractive Index (n20D)	Contact for details

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