Determine the necessary mass, volume, or concentration for preparing a solution.
| Activity Type | Relation | Activity value | Units | Action Type | Journal | PubMed Id | doi | Assay Aladdin ID |
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≥98% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.
Room temperature Ships Normal Check lot-specific COA for exact specifications.
SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.
Cited in 27 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.
Octadecylphosphonic acid (OPA) is used as a self-assembled monolayer that forms a surfactant which strongly bonds with the surface atoms of different metal oxides. It provides hydrophobic properties and covers a higher surface area than the predominantly used silanes
| Pubchem Sid | 504755289 |
|---|---|
| Pubchem Sid Url | https://pubchem.ncbi.nlm.nih.gov/substance/504755289 |
| Canonical Smiles | CCCCCCCCCCCCCCCCCCP(=O)(O)O |
| IUPAC Name | octadecylphosphonic acid |
| InChIKey | FTMKAMVLFVRZQX-UHFFFAOYSA-N |
| INCHI | 1S/C18H39O3P/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-22(19,20)21/h2-18H2,1H3,(H2,19,20,21) |
| Isomeric SMILES | CCCCCCCCCCCCCCCCCCP(=O)(O)O |
| Molecular Weight | 334.47 |
| Beilstein | 4(4)3568 |
| Reaxy-Rn | 1794089 |
| Reaxys-RN_link_address | https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=1794089&ln= |
Comprehensive hazard, handling, storage, and regulatory compliance document.
Download SDS →Lot-specific quality data. Enter your lot number to retrieve the exact COA.
Look up COA →Full quality attributes and acceptance criteria for this grade.
View spec sheet →Taxonomy Tree
| Kingdom | Organic compounds |
|---|---|
| Superclass | Organic acids and derivatives |
| Class | Organic phosphonic acids and derivatives |
| Subclass | Organic phosphonic acids |
| Intermediate Tree Nodes | Not available |
| Direct Parent | Organic phosphonic acids |
| Alternative Parents | Organopnictogen compounds Organophosphorus compounds Organic oxides Hydrocarbon derivatives |
| Molecular Framework | Aliphatic acyclic compounds |
| Substituents | Organophosphonic acid - Organic oxygen compound - Organopnictogen compound - Organic oxide - Hydrocarbon derivative - Organophosphorus compound - Aliphatic acyclic compound |
| Description | This compound belongs to the class of organic compounds known as organic phosphonic acids. These are organic compounds containing phosphonic acid. |
| External Descriptors | Not available |
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Find and download the COA for your product by matching the lot number on the packaging.
| Lot Number | Certificate Type | Date | Item |
|---|---|---|---|
| Certificate of Analysis | May 30, 2026 | O138884 | |
| Certificate of Analysis | May 30, 2026 | O138884 | |
| Certificate of Analysis | May 30, 2026 | O138884 | |
| Certificate of Analysis | Dec 25, 2025 | O138884 | |
| Certificate of Analysis | Dec 25, 2025 | O138884 | |
| Certificate of Analysis | Dec 25, 2025 | O138884 | |
| Certificate of Analysis | Jul 16, 2025 | O138884 | |
| Certificate of Analysis | Jul 16, 2025 | O138884 | |
| Certificate of Analysis | Jun 20, 2025 | O138884 | |
| Certificate of Analysis | Jun 04, 2025 | O138884 | |
| Certificate of Analysis | Mar 14, 2024 | O138884 | |
| Certificate of Analysis | Nov 09, 2023 | O138884 | |
| Certificate of Analysis | Aug 16, 2023 | O138884 | |
| Certificate of Analysis | Aug 16, 2023 | O138884 | |
| Certificate of Analysis | Aug 16, 2023 | O138884 | |
| Certificate of Analysis | Aug 16, 2023 | O138884 | |
| Certificate of Analysis | Aug 16, 2023 | O138884 | |
| Certificate of Analysis | Aug 16, 2023 | O138884 | |
| Certificate of Analysis | Aug 16, 2023 | O138884 | |
| Certificate of Analysis | Aug 16, 2023 | O138884 | |
| Certificate of Analysis | May 10, 2022 | O138884 |
| Solubility | Insoluble in water. |
|---|---|
| Melt Point(°C) | 100-101°C |
| Molecular Weight | 334.500 g/mol |
| XLogP3 | 7.200 |
| Hydrogen Bond Donor Count | 2 |
| Hydrogen Bond Acceptor Count | 3 |
| Rotatable Bond Count | 17 |
| Exact Mass | 334.264 Da |
| Monoisotopic Mass | 334.264 Da |
| Topological Polar Surface Area | 57.500 Ų |
| Heavy Atom Count | 22 |
| Formal Charge | 0 |
| Complexity | 263.000 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| The total count of all stereochemical bonds | 0 |
| Covalently-Bonded Unit Count | 1 |
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