Molekula
Octadecyltrimethylammonium bromide
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
Octadecyltrimethylammonium bromide is a quaternary ammonium compound used as a surfactant, phase transfer catalyst, and antimicrobial agent. Under the name steartrimonium bromide, it is also used as an ingredient in cosmetic and personal care formulations. It is available in powder form with a molecular weight of 392.50 g/mol, CAS number 1120-02-1, and is stable at ambient storage conditions. It is classified as dangerous. Molekula supplies Octadecyltrimethylammonium bromide 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.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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100 g — £46.50 per pack ex VAT · £55.80 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 powder |
| Moisture | ≤0.5 |
| Chromaticity | ≤200 |
| Concentration (Titration) | 99%min |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 9 |
| Packing Group | III |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 26205973 |
| CAS Number | 1120-02-1 |
| IUPAC Name | trimethyl(octadecyl)azanium bromide |
| EC Number | 214-294-5 |
| Molecular Formula | CH3(CH2)17N(Br)(CH3)3 |
| Molecular Weight | 392.50 |
| Exact Mass | 391.2814 |
| SMILES | CCCCCCCCCCCCCCCCCC[N+](C)(C)C.[Br-] |
| InChIKey | SZEMGTQCPRNXEG-UHFFFAOYSA-M |
| InChI | InChI=1S/C21H46N.BrH/c1-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19-20-21-22(2,3)4;/h5-21H2,1-4H3;1H/q+1;/p-1 |
| PubChem CID | 70708 |
| UN Number | UN3077 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| Tariff Code | 2923900090 |
Safety & GHS
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Corrosive
GHS05
-
Health Hazard
GHS07
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Hazardous to the Environment
GHS09
Hazard statements
- H302 Harmful if swallowed
- H315 Causes skin irritation
- H317 May cause an allergic skin reaction
- H318 Causes serious eye damage
- H400 Very toxic to aquatic life
- H410 Very toxic to aquatic life with long lasting effects
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
- P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- 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
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, 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-Octadecanaminium, N,N,N-trimethyl-, bromide
- CATINAL STB
- N,N,N-Trimethyloctadecan-1-aminium bromide
- Octadecy trimethyl ammonium bromide
- OctMAB
- ODTEA Br cpd
- Steartrimonium Bromide
- Stearyltrimethylammonium Bromide
- Trimethyloctadecylammonium bromide
- Trimethylstearylammonium Bromide
Frequently asked questions
What is Octadecyltrimethylammonium bromide used for?
It is commonly used as a surfactant, phase-transfer catalyst, and in the formulation of antistatic agents and water-repellent coatings.
What is the chemical formula and molecular weight?
The formula is CH3(CH2)17N(Br)(CH3)3 with a molecular weight of 392.50 g/mol.
How should this compound be stored?
Store at ambient temperature, away from moisture and incompatible substances, as it is classified as a hazardous material.
What grade is available?
Available in technical grade; custom grades may be available upon request.
Can Molekula supply it in bulk?
Yes, bulk quantities are available—please contact our sales team for pricing and availability.
What documentation comes with the order?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) upon request.
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.