Molekula
Octadecyltrimethylammonium chloride
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 chloride is a quaternary ammonium compound used as a surfactant, antimicrobial agent, and cationic modifier in industrial and laboratory applications. It is also used as an ingredient in cosmetic formulations, where it is listed under the name steartrimonium chloride. It is a white to off-white solid, soluble in water and organic solvents. CAS: 112-03-8, Molecular formula: C21H46NCl, Molecular weight: 348.05 g/mol, stored at ambient temperature. Signal word: Danger. Molekula supplies Octadecyltrimethylammonium chloride 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 — $97.60 per pack
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500 g — $265.30 per pack
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 | Light Yellow to White Powder |
| Water | ≤1.0% |
| Heavy metals | ≤0.001% |
| Identification | Conforms to reference |
| pH | 6-8 |
| Assay | ≥99.0% |
| Residue on Ignition | ≤0.5% |
| Iron (Fe) | ≤0.001% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 8 |
| Packing Group | II |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 61986888 |
| CAS Number | 112-03-8 |
| IUPAC Name | trimethyl(octadecyl)azanium chloride |
| EC Number | 203-929-1 |
| Molecular Formula | CH3(CH2)17N(Cl)(CH3)3 |
| Molecular Weight | 348.05 |
| Exact Mass | 347.3319 |
| SMILES | CCCCCCCCCCCCCCCCCC[N+](C)(C)C.[Cl-] |
| InChIKey | VBIIFPGSPJYLRR-UHFFFAOYSA-M |
| InChI | InChI=1S/C21H46N.ClH/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 | 8155 |
| UN Number | UN3261 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2923.90.01.00 |
| Tariff Code | 2923900090 |
Safety & GHS
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Corrosive
GHS05
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Health Hazard
GHS07
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Hazardous to the Environment
GHS09
Hazard statements
- H302 Harmful if swallowed
- H312 Harmful in contact with skin
- H314 (sub cat. 1C) Causes severe skin burns and eye damage
- H318 Causes serious eye damage
- H400 Very toxic to aquatic life
- H410 Very toxic to aquatic life with long lasting effects
Precautionary statements
- P260 Do not breathe 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, 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
- Aliquat 7
- Arquad 18
- Arquad 18-50
- Cation AB
- Monostearyl trimethyl ammonium chloride
- Nissan cation AB
- Quaternium-10
- Stac
- Stearyltrimethylammonium chloride
- Trimethylstearylammonium chloride
Frequently asked questions
What is octadecyltrimethylammonium chloride used for?
It is commonly used as a surfactant, phase-transfer catalyst, and in the formulation of antistatic agents and water repellents.
What is the chemical formula and molecular weight?
The formula is CH3(CH2)17N(Cl)(CH3)3 with a molecular weight of 348.05 g/mol.
How should it be stored?
Store at ambient temperature, away from moisture and incompatible materials.
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 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.