Description

Octadecylphosphonic Acid is a high-purity, long-chain organophosphorus compound with the CAS registry number 4724-47-4. It serves as a critical surface modification agent and intermediate, prized for its ability to form robust, self-assembled monolayers on various metal oxide substrates. This product is essential for manufacturers and researchers in the advanced materials, electronics, and nanotechnology sectors seeking to precisely control surface properties for enhanced performance.

Application

• Surface Modification Agent: Forms self-assembled monolayers (SAMs) on metal oxides (e.g., aluminum oxide, titanium dioxide, indium tin oxide) for corrosion inhibition, improved adhesion, or to alter surface wettability.
• Lubricant & Anti-Wear Additive: Used as an additive in advanced lubricants and coatings to reduce friction and wear on metal surfaces.
• Nanotechnology & Electronics: Key precursor for functionalizing nanoparticles and quantum dots, and for creating dielectric layers or alignment layers in electronic and optoelectronic devices.
• Metal Chelation & Extraction: Acts as a selective chelating agent for certain metal ions in separation and purification processes.
• Polymer Additive: Incorporated into polymers as a flame retardant or stabilizer to enhance material properties.
• Research & Development: A vital building block in organic synthesis and materials science research for developing new functional materials.

Basic Information

Product Name	Octadecylphosphonic Acid
CAS No.	4724-47-4
Molecular Formula	C₁₈H₃₉O₃P
Molecular Weight	334.47 g/mol
Synonyms	Stearylphosphonic Acid; n-Octadecylphosphonic Acid; ODPA; 1-Octadecanephosphonic Acid; Octadecane-1-phosphonic Acid; Phosphonic acid, octadecyl-; Octadecylphosphonate; n-Stearylphosphonic Acid
EINECS	225-214-8

Quality Control

Our Octadecylphosphonic Acid is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets high-grade specifications suitable for research and industrial applications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee traceability and consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture. Keep away from strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white powder or crystals
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 97.0%
Melting Point	98 - 102 °C
Loss on Drying	≤ 1.0 %

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