Description

1-Undecylphosphonic Acid is a high-purity, long-chain organophosphorus compound that serves as a critical building block and surface modifier. Its unique structure, featuring a phosphonic acid head group and an undecyl hydrocarbon tail, provides excellent chelating and self-assembling properties for advanced material synthesis. This chemical is essential for researchers and manufacturers in the electronics, nanotechnology, and specialty chemical sectors seeking to engineer surfaces with specific functional characteristics.

Application

• Surface Modification Agent: Used to form self-assembled monolayers (SAMs) on metal oxides (e.g., titanium, aluminum, indium tin oxide) for corrosion inhibition, improved adhesion, or to alter surface wettability.
• Nanoparticle Capping Ligand: Acts as a stabilizer and functionalization agent for metal and metal oxide nanoparticles, controlling particle growth, preventing aggregation, and introducing specific surface chemistry.
• Extractant & Chelating Agent: Employed in solvent extraction processes for the separation and recovery of valuable or hazardous metal ions from aqueous solutions.
• Lubricant & Anti-wear Additive: Incorporated into advanced lubricant formulations where the phosphonic acid group chemisorbs to metal surfaces, forming a protective layer that reduces friction and wear.
• Intermediate for Specialty Chemicals: Serves as a key precursor in the synthesis of more complex organophosphorus compounds, including flame retardants, plasticizers, and pharmaceutical intermediates.
• Adhesion Promoter: Enhances the bonding between organic polymers and inorganic substrates in composite materials and coatings.

Basic Information

Product Name	1-Undecylphosphonic Acid
CAS No.	5137-69-9
Molecular Formula	C₁₁H₂₅O₃P
Molecular Weight	236.29 g/mol
Synonyms	Undecylphosphonic Acid; n-Undecylphosphonic Acid; Phosphonic acid, undecyl-; 1-Undecylphosphonic Acid; Undecanephosphonic Acid; Monoundecylphosphonate; HDPA (C11); C11-Phosphonic Acid
EINECS	225-881-9

Quality Control

Our 1-Undecylphosphonic Acid is produced under stringent quality management protocols. Each batch undergoes comprehensive analytical testing to ensure high purity and consistent performance. We provide traceable Certificates of Analysis (COA) detailing key parameters such as assay, identity, and impurity profiles. Our quality systems are designed to support research, development, and industrial scale-up with reliable material specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive). Keep the container tightly sealed under an inert atmosphere (e.g., nitrogen or argon) to minimize moisture uptake and potential degradation. Keep away from strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 97.0%
Melting Point	Contact for details
Water Content (KF)	≤ 1.0%

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