74731
1-Octadecanethiol
purum, ≥95.0% (GC)
Synonym(s):
Mercaptan C18, Octadecyl mercaptan, Stearyl mercaptan
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About This Item
Linear Formula:
CH3(CH2)17SH
CAS Number:
Molecular Weight:
286.56
UNSPSC Code:
12352300
NACRES:
NA.23
PubChem Substance ID:
EC Number:
220-744-1
Beilstein/REAXYS Number:
1811934
MDL number:
grade
purum
Quality Level
assay
≥95.0% (GC)
form
solid
bp
204-210 °C/11 mmHg (lit.)
mp
30-33 °C (lit.)
density
0.847 g/mL at 25 °C (lit.)
SMILES string
CCCCCCCCCCCCCCCCCCS
InChI
1S/C18H38S/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19/h19H,2-18H2,1H3
InChI key
QJAOYSPHSNGHNC-UHFFFAOYSA-N
General description
1-Octadecanethiol (ODT) is a water soluble sulfur compound with an 18 carbon alkyl chain, which forms a strong hydrophobic assembly with transition metals, like gold .It forms self-assembled monolayers (SAMs) on the surface of such transition metals. The thiol membrane when covalently bonded with the surface of the metal electrode, it shows electrostriction phenomenon leading to variation in capacitance.ODT SAMs have a hydrophobic surface with contact angle of 102oC.
Application
ODT is used to deposit thiolated molecules onto the surface of gold substrates, such as
- SAMs on gold quartz crystal resonators.
- on the tip of atomic force microscope probes.
- capacitive sensors.
Analysis Note
may contain precipitation in melt
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signalword
Warning
hcodes
Hazard Classifications
Aquatic Acute 1 - Skin Irrit. 2
Storage Class
11 - Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
dust mask type N95 (US), Eyeshields, Gloves
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Polarization modulation Fourier transform infrared reflectance measurements of thin films and monolayers at metal surfaces utilizing real-time sampling electronics.
Barbara BJ, et al
Analytical Chemistry, 63(1), 55-60 (1991)
Yanxia Hou et al.
Langmuir : the ACS journal of surfaces and colloids, 21(9), 4058-4065 (2005-04-20)
To make ultrathin films for the fabrication of artificial olfactory systems, odorant biosensors, we have investigated mixed Langmuir and Langmuir-Blodgett films of odorant-binding protein/amphiphile. Under optimized experimental conditions (phosphate buffer solution, pH 7.5, OBP-1F concentration of 4 mg L(-1), target
Ken Kobayashi et al.
Journal of chromatography. A, 1110(1-2), 95-101 (2006-02-14)
Three types of thiol compounds (n-octadecanethiol, thiophenol, and 2-phenylethanethiol) were used to modify the gold-coated polystyrene particles (dp. 5microm) to prepare a stationary phase for capillary liquid chromatography through the formation of self-assembled monolayer. The column with n-octadecanethiol-modified gold-coated polystyrene
Global Trade Item Number
| SKU | GTIN |
|---|---|
| 138053-5G | 04061832098012 |
| 74731-250G | 04061832882574 |
| 74731-50G | 04061832882581 |