Molekula
1-Octadecanethiol
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · 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
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.
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100 g — £74.80 per pack ex VAT · £89.76 inc. VAT
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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
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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.
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.