Description

11-Mercaptoundecylphosphoric Acid, 99 is a high-purity, bifunctional organophosphorus compound featuring both a terminal thiol (-SH) and a phosphoric acid group. This unique molecular architecture makes it an exceptionally versatile building block for creating self-assembled monolayers (SAMs) and functionalized surfaces. It is critically important for researchers and manufacturers in nanotechnology and advanced materials who require precise surface modification and controlled interfacial properties. Key industries that utilize this specialty chemical include semiconductors, biomedical device coatings, and catalysis.

Application

• Formation of self-assembled monolayers (SAMs) on gold, silver, and other metal surfaces for corrosion inhibition or sensor development.
• Surface functionalization of metal oxides (e.g., titanium dioxide, iron oxide) for biomedical applications, including implant coatings and targeted drug delivery systems.
• As a molecular anchor or linker in nanotechnology for attaching nanoparticles, biomolecules, or polymers to create hybrid materials.
• Modification of electrode surfaces in electrochemical biosensors to enhance sensitivity and specificity.
• Component in the synthesis of specialized surfactants or lubricant additives due to its dual hydrophilic/hydrophobic character.
• Research and development of novel catalysts where the phosphoric acid group acts as an acidic site and the thiol provides a coordination point.

Basic Information

Product Name	11-Mercaptoundecylphosphoric Acid, 99
CAS No.	188678-49-1
Molecular Formula	C11H25O4PS
Molecular Weight	284.35 g/mol
Synonyms	11-Mercaptoundecylphosphonic Acid; Undecylphosphorothioic Acid; 11-Sulfanylundecane-1-phosphonic Acid; 11-Mercaptoundecylphosphonate; Phosphonic acid, P-[11-(mercapto)undecyl]-; Thiol-terminated alkylphosphonic acid; C11 SH-PA; 188678-49-1
EINECS	Contact for details

Quality Control

Our 11-Mercaptoundecylphosphoric Acid, 99 is produced under strict quality management protocols to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including HPLC for assay and purity verification, and spectroscopic methods for structural confirmation. A Certificate of Analysis (COA) detailing all relevant specifications is provided with every shipment to support your quality assurance and R&D documentation.

Storage

Preserve in a tightly closed container, protected from light. Store under an inert atmosphere (e.g., nitrogen or argon) at 2-8°C to minimize oxidation and moisture absorption. Keep the container in a cool, dry, and well-ventilated place, away from strong oxidizing agents and bases.

Specification

Item	Specification
Appearance	White to off-white solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 99.0%
Water Content (KF)	≤ 0.5%

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