1-Octadecanethiol
SIAL/74731 - purum, ≥95.0% (GC)
Synonym: Mercaptan C18; Octadecyl mercaptan; Stearyl mercaptan
CAS Number: 2885-00-9
Empirical Formula (Hill Notation): C18H38S
Molecular Weight: 286.56
EC Number: 220-744-1
MDL Number: MFCD00004886
Linear Formula: CH3(CH2)17SH
Product Type: Chemical
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material. This image depicts SKU: 74731-250G
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material. This image depicts SKU: 74731-50G
| assay | ≥95.0% (GC) |
| bp | 204-210 °C/11 mmHg (lit.) |
| density | 0.847 g/mL at 25 °C (lit.) |
| form | solid |
| grade | purum |
| InChI | 1S/C18H38S/c1-2-3-4-5-6-7 |
| InChI key | QJAOYSPHSNGHNC-UHFFFAOYSA |
| mp | 30-33 °C (lit.) |
| Quality Level | 200  |
| SMILES string | CCCCCCCCCCCCCCCCCCS |
| Analysis Note: | may contain precipitation in melt |
| 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. |
| 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. |
| Packaging: | 50, 250 g in glass bottle |
| Symbol |   GHS07,GHS09 |
| Signal word | Warning |
| Hazard statements | H315 - H400 |
| Precautionary statements | P264 - P273 - P280 - P302 + P352 - P332 + P313 - P362 + P364 |
| Hazard Codes | Xi |
| Risk Statements | 36/37/38 |
| Safety Statements | 26-36 |
| RIDADR | UN 3335 |
| WGK Germany | WGK 3 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| Purity | ≥95.0% (GC) |
| bp | 204-210 °C/11 mmHg (lit.) |
| mp | 30-33 °C (lit.) |
| Density | 0.847 g/mL at 25 °C (lit.) |
| UNSPSC | 12352300 |