INTRODUCTION
Octadecylphosphonic acid (ODPA), a versatile chemical compound, serves as a surfactant and dispersant in applications spanning coatings, lubricants, and corrosion inhibition. With its hydrophobic octadecyl chain linked to a phosphonic acid group, it excels in surface modification, boosting adhesion in metal surfaces.
MANUFACTURE
It is synthesized by heating 1-bromooctadecane with triethyl phosphite. The reaction proceeds through a nucleophilic substitution mechanism.
| Synonym | n-Octadecylphosphonic acid, Phosphonic acid, octadecyl- |
| CAS no. | 4724-47-4 |
| EINECS no. | 225-216-4 |
| Molecular formula | C18H39O3P |
| Molecular weight | 334.47 |
| Structure |  |
| APPLICATIONS |
|---|
| It serves as a vital surface modifier and coupling agent, enhancing adhesion between substrates and coatings or adhesives |
| It effectively inhibits corrosion in metals, notably aluminum and its alloys, by forming a protective barrier that wards off corrosive agents, thereby minimizing corrosion rates |
| It is essential for antistatic coatings and films in plastics, textiles, and paper, aiding in static charge dissipation and improving substrate conductivity |
| It enhances lubrication by serving as an additive in oils and greases, boosting boundary lubrication and diminishing friction and wear in mechanical systems like engines and gearboxes |
| It enhances adhesion in paints, coatings, and adhesives, ensuring strong bonds and enhanced durability. |
| ODPA-coated surfaces or nanoparticles show promise in biomedical applications like drug delivery, tissue engineering, and bioimaging due to their biocompatibility and customizable surface traits. |
SPECIFICATIONS
| Test | Unit | Specifications |
|---|---|---|
| Appearance | – | White to off-white powder |
| Identification by 1H NMR | – | Should confirm with the structure |
| Purity by GC | % | NLT 99.0 |
| Melting point | °C | Min 95.0 (final melt) |
STORAGE
Store at ambient temperature; Keep the container tightly closed
PACKING
HDPE drums
REACH Status
Not registered
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