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Sigma-Aldrich

Octadecylphosphonic acid

97%

Synonym(s):

n-Octadecylphosphonic acid, ODPA

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About This Item

Empirical Formula (Hill Notation):
C18H39O3P
CAS Number:
4724-47-4
Molecular Weight:
334.47
MDL number:
MFCD00015838
UNSPSC Code:
12352300
PubChem Substance ID:
329762947
NACRES:
NA.23

Assay

97%

form

crystals

mp

95-100 °C

SMILES string

CCCCCCCCCCCCCCCCCCP(O)(O)=O

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)

InChI key

FTMKAMVLFVRZQX-UHFFFAOYSA-N

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General description

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.

Application

Anti-corrosive coatings on cupronickel (CuNi) can be formed by fabricating a protective film of OPA by dip coating method. OPA may be used in the preparation of indium oxide(In2O3) nanowire transistor than can find potential application in the growth of fast switching and low noise nano-electronic devices. It may be used for self-cleaning and oil/water separation based applications as it forms a superhydrophobic layer on the copper mesh.

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H315,H319

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Resistance of Superhydrophobic Surface-Functionalized TiO2 Nanotubes to Corrosion and Intense Cavitation.
Hua W.
Nanomaterials, 8(10), 783-783 (2018)
Getachew Tizazu et al.
Langmuir : the ACS journal of surfaces and colloids, 25(18), 10746-10753 (2009-07-18)
Electron-hole pair formation at titania surfaces leads to the formation of reactive species that degrade organic materials. Here, we describe the degradation of self-assembled monolayers of alkylphosphonic acids on the native oxide of titanium following exposure to UV light. The
Fabrication of controllable and stable In2O3 nanowire transistors using an octadecylphosphonic acid self-assembled monolayer.
Lim T, et al.
Nanotechnology, 26(14), 145203-145203 (2015)
Deepshikha Arora et al.
ACS nano, 14(8), 10337-10345 (2020-08-19)
Branched heterostructured semiconductor nanoparticles such as core seeded tetrapods and octapods offer properties not seen in their spherical core-shell counterparts, but are challenging to synthesize with a large diversity of branch numbers via heterogeneous nucleation and growth processes alone. This
Fast formation of superhydrophobic octadecylphosphonic acid (ODPA) coating for self-cleaning and oil/water separation.
Dai C, et al.
Soft Matter, 10(40), 8116-8121 (2014)
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