Octadecylphosphonic acid
Octadecylphosphonic acid (CAS: 4724-47-4; C18H39O3P) is a long-chain alkylphosphonic acid with a molecular weight of 334.47 g/mol. It is primarily utilised in materials science, particularly in micro/nanoelectronics and self-assembly applications. This compound serves as a valuable building block for creating ordered molecular layers on surfaces, facilitating advancements in nanotechnology and surface modification techniques.
- IUPAC
- n-Octadecylphosphonic acid,ODPA

Surface Modification
Octadecylphosphonic acid is employed to form self-assembled monolayers (SAMs) on various substrates. These SAMs can alter surface properties such as wettability, adhesion, and friction.
Nanotechnology and Microelectronics
It finds use in the fabrication of microelectronic devices and in nanoscale engineering due to its ability to create well-defined molecular interfaces.
Materials Science Research
This phosphonic acid is a key reagent in materials science for developing novel materials and investigating surface phenomena.
| Molecular weight | 334.47 |
|---|---|
| Empirical formula | C18H39O3P |
| Assay | 97% |
| Melting point | 95-100 °C |
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Octadecylphosphonic acid used for?
+
Octadecylphosphonic acid is primarily used in materials science for applications such as forming self-assembled monolayers (SAMs) on surfaces, modifying surface properties, and in the fabrication of micro/nanoelectronic devices.
What are the CAS number and chemical formula for Octadecylphosphonic acid?
+
The CAS number for Octadecylphosphonic acid is 4724-47-4, and its chemical formula is C18H39O3P.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies Octadecylphosphonic acid with an assay of 97%. This is a technical/research grade material, and TSS does not represent it as USP, BP, or EP grade.
What are the safety and handling considerations for Octadecylphosphonic acid?
+
Octadecylphosphonic acid is classified under WHMIS Germany as hazard class 3. Users should consult the Safety Data Sheet (SDS) for comprehensive safety and handling information, including appropriate personal protective equipment and disposal procedures.
How is Octadecylphosphonic acid packed, shipped, and exported?
+
Octadecylphosphonic acid is carefully packed according to industry standards to ensure safe transit. Tech Serve Solutions has extensive experience in exporting chemicals globally and adheres to all relevant shipping regulations.
How can I request a sample or quote for Octadecylphosphonic acid?
+
To request a sample or a quote for Octadecylphosphonic acid, please contact our sales department through the website or by phone, providing your specific requirements.
▶ Related products

(11-Mercaptoundecyl)-N,N,N-trimethylammonium bromide
Micro / NanoElectronics

(11-Mercaptoundecyl)hexa(ethylene glycol)
C23H48O7S
Micro / NanoElectronics
(12-Phosphonododecyl)phosphonic acid
C12H28O6P2
Micro / NanoElectronics
(2,2,3,3,4,4,5,5,6,6,7,7,7-Tridecafluoroheptyl)oxirane
C9H5F13O
Micro / NanoElectronics
(2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,9-Heptadecafluorononyl)oxirane
C11H5F17O
Micro / NanoElectronics
(3-Chloropropyl)dimethoxymethylsilane
Cl(CH2)3Si(OCH3)2CH3
Micro / NanoElectronics
(3-Chloropropyl)trimethoxysilane
Cl(CH2)3Si(OCH3)3
Micro / NanoElectronics
(4-Bromophenyl)diphenylsulfonium triflate
C19H14BrF3O3S2
Micro / NanoElectronics▶ Explore more

3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis

3-Methyl-1,5-pentanediol
Chemical Synthesis

3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis