Molekula
1-Octadecanethiol
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
1-Octadecanethiol is a long-chain thiol used in surface modification, nanomaterial synthesis, and self-assembled monolayer formation. It also serves as a reagent in organic synthesis and is used in synthetic rubber processing and in anti-tarnish formulations. It is a colorless to pale yellow liquid with a strong odor. CAS: 2885-00-9, molecular formula: CH3(CH2)17SH, molecular weight: 286.56 g/mol. Stored at ambient temperature. Signal word: Warning. Molekula supplies 1-Octadecanethiol from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
In stock — same-day dispatch
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
-
100 g — £74.80 per pack ex VAT · £89.76 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White fused solid or lumps, >30° colourless liquid |
| Density | 0.847 g/ml at 25°C |
| Melting Point | 30° - 33° C |
| Water | <0.1% |
| Solubility | Insoluble in water |
| Assay GC | >98% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 185 °C |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Melting Point | 24-31 °C |
| Density | 0.85 (relative, water = 1) |
Source: PubChem CID 17905 (ICSC)
Identification
| Property | Value |
|---|---|
| SKU | 44465586 |
| CAS Number | 2885-00-9 |
| IUPAC Name | octadecane-1-thiol |
| EC Number | 220-744-1 |
| Molecular Formula | CH3(CH2)17SH |
| Molecular Weight | 286.56 |
| Exact Mass | 286.2694 |
| SMILES | CCCCCCCCCCCCCCCCCCS |
| InChIKey | QJAOYSPHSNGHNC-UHFFFAOYSA-N |
| InChI | 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 |
| PubChem CID | 17905 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29309098 |
| Tariff Code | 2930909599 |
Safety & GHS
-
Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
- H413 May cause long lasting harmful effects to aquatic life
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P501 Dispose of contents/container to an approved waste disposal plant
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
- 1-Mercaptooctadecane
- 1-Octadecyl mercaptan
- n-octadecanethiol
- n-Octadecyl mercaptan
- octadecane-1-thiol
- Octadecanethiol
- OCTADECANTHIOL
- Octadecyl mercaptan
- octadecylthiol
- Stearyl mercaptan
Frequently asked questions
What is 1-Octadecanethiol used for?
It is primarily used as a ligand in nanotechnology, particularly for stabilizing gold nanoparticles, and as a surface modifier in self-assembled monolayers.
What is the chemical formula and molecular weight of 1-Octadecanethiol?
The formula is CH3(CH2)17SH with a molecular weight of 286.56 g/mol.
How should 1-Octadecanethiol be stored?
It should be stored at ambient temperature, protected from light and moisture.
What grade is available for 1-Octadecanethiol?
Available in technical grade; purity details are provided upon request.
Can Molekula supply 1-Octadecanethiol in bulk?
Yes, bulk quantities are available—please contact our sales team for pricing and availability.
What documentation comes with an order of 1-Octadecanethiol?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) with the shipment.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.