Molekula
Tetramethylammonium 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
Tetramethylammonium bromide is a quaternary ammonium salt widely used as a phase-transfer catalyst in organic synthesis, a reagent in biochemical research, and a component in electroplating and textile treatments. It appears as a hygroscopic, white crystalline solid with high solubility in water and polar solvents. Catalogue details include CAS 64-20-0, molecular formula (CH3)4N(Br), and a molecular weight of 154.05 g/mol. Store at ambient conditions; the product is classified with a signal word of Danger due to its acute oral toxicity (fatal if swallowed), and it is also irritating to the skin, eyes and respiratory tract. Molekula supplies Tetramethylammonium 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.
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100 g — £26.40 per pack ex VAT · £31.68 inc. VAT
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Specifications
| Property | Value |
|---|---|
| Appearance | White crystalline powder |
| Identification | Conforms to reference |
| Assay | ≥ 98% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 6.1 |
| Packing Group | II |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 38302697 |
| CAS Number | 64-20-0 |
| IUPAC Name | tetramethylazanium bromide |
| EC Number | 200-581-2 |
| Molecular Formula | (CH3)4N(Br) |
| Molecular Weight | 154.05 |
| Exact Mass | 153.0153 |
| SMILES | C[N+](C)(C)C.[Br-] |
| InChIKey | DDFYFBUWEBINLX-UHFFFAOYSA-M |
| InChI | InChI=1S/C4H12N.BrH/c1-5(2,3)4;/h1-4H3;1H/q+1;/p-1 |
| PubChem CID | 66137 |
| UN Number | UN2811 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2923.90.01.00 |
| Tariff Code | 2923900090 |
Safety & GHS
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Toxic
GHS06
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Health Hazard
GHS07
Hazard statements
- H300 Fatal if swallowed
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- P302+352 IF ON SKIN: Wash with soap and water
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- 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
- Ammonium, tetramethyl-, bromide
- Methanaminium, N,N,N-trimethyl-, bromide
- Methanaminium, N,N,N-trimethyl-, bromide (1:1)
- Methanaminium,N,N-trimethyl-, bromide
- Methyl, (dimethylamino)-, methobromide
- Methyl, (dimethylamino)-, methobromide (7CI)
- N,N,N-Trimethylmethanaminium bromide
- tetramethylazanium;bromide
Frequently asked questions
What is tetramethylammonium bromide commonly used for?
It is primarily used as a phase-transfer catalyst in organic synthesis, as a reagent in biochemical research, and in the preparation of quaternary ammonium compounds.
What is the molecular formula and molecular weight of tetramethylammonium bromide?
The molecular formula is (CH₃)₄N(Br), and the molecular weight is 154.05 g/mol.
How should tetramethylammonium bromide be stored?
Store at ambient temperature in a cool, dry place, away from incompatible substances like strong oxidizers.
What purity grades are available for this product?
Molekula supplies ACS reagent grade and technical grade for tetramethylammonium bromide.
Can Molekula supply tetramethylammonium bromide in bulk quantities?
Yes, we offer bulk packaging options—please contact our sales team for specific quantities and pricing.
What documentation is provided with an order of tetramethylammonium bromide?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), and a product specification sheet.
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.