Molekula
Tetraethylammonium hydroxide 40% solution in water
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
Tetraethylammonium hydroxide 40% solution in water is a strong organic base used in organic synthesis, catalysis, and as a reagent in the production of specialty chemicals. It is a clear, colorless to pale yellow liquid with a characteristic ammoniacal odor. CAS: 77-98-5, Molecular formula: (C2H5)4N(OH), Molecular weight: 147.26 g/mol. Store at ambient temperature. Hazardous: corrosive, causes severe skin burns and eye damage. Molekula supplies Tetraethylammonium hydroxide 40% solution in water 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.
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500 mL — £301.00 per pack ex VAT · £361.20 inc. VAT
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Specifications
| Property | Value |
|---|---|
| Appearance | Clear colourless to light yellow transparent liquid |
| Assay | ≥35% |
| APHA | ≤20Hazen |
| Bromine (Br) | ≤500ppm |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 8 |
| Packing Group | II |
| Acidity | Base |
Identification
| Property | Value |
|---|---|
| SKU | 43910420 |
| CAS Number | 77-98-5 |
| IUPAC Name | tetraethylazanium hydroxide |
| EC Number | 201-073-3 |
| Molecular Formula | (C2H5)4N(OH) |
| Molecular Weight | 147.26 |
| Exact Mass | 147.1623 |
| SMILES | CC[N+](CC)(CC)CC.[OH-] |
| InChIKey | LRGJRHZIDJQFCL-UHFFFAOYSA-M |
| InChI | InChI=1S/C8H20N.H2O/c1-5-9(6-2,7-3)8-4;/h5-8H2,1-4H3;1H2/q+1;/p-1 |
| PubChem CID | 6509 |
| UN Number | UN3267 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29239000 |
| Tariff Code | 2923900090 |
Safety & GHS
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Corrosive
GHS05
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Toxic
GHS06
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Serious Health Hazard
GHS08
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Hazardous to the Environment
GHS09
Hazard statements
- H290 May be corrosive to metals
- H302 Harmful if swallowed
- H311 Toxic in contact with skin
- H314 Causes severe skin burns and eye damage
- H318 Causes serious eye damage
- H370 Causes damage to organs
- H372 Causes damage to organs through prolonged or repeated exposure
- H410 Very toxic to aquatic life with long lasting effects
Precautionary statements
- P231 Handle under inert gas
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P271 Use only outdoors or in a well-ventilated area
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P310 Immediately call a POISON CENTER or doctor/physician
Documents
Safety Data Sheets (SDS)
Available in Czech, 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.
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
- 77-98-5(water)
- Ammonium, tetraethyl-, hydroxide
- ETHANAMINIUM, N,N,N-TRIETHYL-, HYDROXIDE
- Ethanaminium, N,N,N-triethyl-, hydroxide (1:1)
- Hydroxide, Tetraethylammonium
- IPC-TEA-OH
- n,n,n-triethylethanaminium hydroxide
- Tetraethylammonium hydroxide(TEAH)
- Tetraethylammonium hydroxyde
- tetraethylazanium;hydroxide
Frequently asked questions
What is tetraethylammonium hydroxide used for?
It is primarily used as a strong base in organic synthesis, particularly in elimination reactions and as a phase-transfer catalyst.
What is the chemical formula and molecular weight?
The formula is (C2H5)4N(OH) and the molecular weight is 147.26 g/mol.
How should tetraethylammonium hydroxide be stored?
It should be stored at ambient temperature, away from light and moisture, and kept in a tightly sealed container.
What grade is available?
Molekula supplies tetraethylammonium hydroxide as a reagent-grade 40% solution in water.
Can Molekula supply it in bulk?
Yes, Molekula can supply tetraethylammonium hydroxide in bulk quantities; please contact our sales team for details.
What documentation comes with the order?
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.