74731

1-Octadecanethiol

purum, ≥95.0% (GC)

• Synonym(s): Mercaptan C₁₈, Octadecyl mercaptan, Stearyl mercaptan
• Linear Formula: CH₃(CH₂)₁₇SH
• CAS Number: 2885-00-9
• Molecular Weight: 286.56
• Beilstein: 1811934
• EC Number: 220-744-1
• MDL number: MFCD00004886
• UNSPSC Code: 12352300
• PubChem Substance ID: 329765824
• NACRES: NA.23

Properties

• grade: purum
• Quality Level: 200
• 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

Description

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 102^oC.

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

Safety Information

• Pictograms: GHS07,GHS09
• Signal Word: Warning
• Hazard Statements: H315,H400
• Precautionary Statements: P264 - P273 - P280 - P302 + P352 - P332 + P313 - P362 + P364
• Hazard Classifications: Aquatic Acute 1 - Skin Irrit. 2
• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves