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74731

1-Octadecanethiol

purum, ≥95.0% (GC)

Synonym(s):

Mercaptan C18, Octadecyl mercaptan, Stearyl mercaptan

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50 g
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$64.90
250 g
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$252.00

About This Item

Linear Formula:
CH3(CH2)17SH
CAS Number:
2885-00-9
Molecular Weight:
286.56
UNSPSC Code:
12352300
NACRES:
NA.23
PubChem Substance ID:
329765824
EC Number:
220-744-1
Beilstein/REAXYS Number:
1811934
MDL number:
MFCD00004886

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grade

purum

Quality Segment

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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1 of 1

This Item
O1858S13500001622000
1-Octadecanethiol purum, ≥95.0% (GC)

Sigma-Aldrich

74731

1-Octadecanethiol

1-Octadecanethiol 98%

Sigma-Aldrich

O1858

1-Octadecanethiol

Stearyl alcohol European Pharmacopoeia (EP) Reference Standard

S1350000

Stearyl alcohol

Stearyl alcohol United States Pharmacopeia (USP) Reference Standard

USP

1622000

Stearyl alcohol

description

purum, ≥95.0% (GC)

description

98%

description

European Pharmacopoeia (EP) Reference Standard

description

United States Pharmacopeia (USP) Reference Standard

form

solid

form

-

form

-

form

-

Quality Level

200

Quality Level

200

Quality Level

-

Quality Level

-

density

0.847 g/mL at 25 °C (lit.)

density

0.847 g/mL at 25 °C (lit.)

density

0.812 g/mL at 25 °C (lit.)

density

0.812 g/mL at 25 °C (lit.)

mp

30-33 °C (lit.)

mp

30-33 °C (lit.)

mp

56-59 °C (lit.)

mp

56-59 °C (lit.)

grade

purum

grade

-

grade

pharmaceutical primary standard

grade

pharmaceutical primary standard

bp

204-210 °C/11 mmHg (lit.)

bp

204-210 °C/11 mmHg (lit.)

bp

-

bp

-

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Pictograms

Exclamation markEnvironment
GHS07,GHS09

Signal Word

Warning

Hazard Codes

H315,H400

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 (personal protective equipment)

dust mask type N95 (US), Eyeshields, Gloves

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