Molekula
Tetraethylammonium hydroxide 25% 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 is a quaternary ammonium compound used as a phase-transfer catalyst, pH adjuster, and structure-directing agent in organic synthesis, polymer chemistry, zeolite synthesis, and analytical applications. It also serves as a laboratory reagent, an ion exchange agent, a chain transfer agent in polymerization, and an industrial processing aid. This 25% aqueous solution (CAS 77-98-5) features the molecular formula (C2H5)4N(OH) with a molecular weight of 147.26 g/mol. Store at ambient conditions. The product carries a Danger signal word due to its corrosive and hazardous properties. Molekula supplies Tetraethylammonium hydroxide 25% solution 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
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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 | Colorless to light yellow transparent liquid |
| Assay | 25% +/-0.5% |
| APHA | <20 hazen |
| Bromine (Br) | <500ppm |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 8 |
| Packing Group | II |
| Acidity | Base |
Identification
| Property | Value |
|---|---|
| SKU | 25567988 |
| 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 |
| Tariff Code | 2923900090 |
Safety & GHS
-
Corrosive
GHS05
-
Serious Health Hazard
GHS08
-
Hazardous to the Environment
GHS09
Hazard statements
- H290 May be corrosive to metals
- H314 (sub cat. 1B) Causes severe skin burns and 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
- 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
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- 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 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 (25% solution) commonly used for?
This solution is primarily used as a phase-transfer catalyst in organic synthesis, as a pH adjuster in analytical chemistry, and as a structure-directing agent in zeolite synthesis.
What is the molecular formula and molecular weight of tetraethylammonium hydroxide?
The molecular formula is (C₂H₅)₄N(OH), and the molecular weight is 147.26 g/mol (for the free base; the 25% solution accounts for water content).
How should tetraethylammonium hydroxide solution be stored?
Store at ambient temperature in a tightly sealed container, away from moisture and incompatible substances like strong acids or oxidizing agents.
What grades or purities of tetraethylammonium hydroxide solution does Molekula offer?
We supply this as a 25% solution in water, meeting standard analytical and industrial purity requirements (approximately 25% tetraethylammonium hydroxide content).
Can Molekula provide tetraethylammonium hydroxide in bulk quantities?
Yes, we offer this product in bulk packaging (e.g., 25L, 200L drums, or IBCs) for large-scale industrial or research applications—please inquire for specific availability.
What documentation is provided with an order of tetraethylammonium hydroxide solution?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), and a product specification sheet detailing purity, hazard classification (Signal Word: Danger), and handling instructions.
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.