Tetramethylammonium hydroxide
Also known as: TMAH, N,N,N-Trimethylmethanaminium hydroxide, Tetramethylammonium hydroxide solution, TMNOH, Tetramethylammonium hydroxide pentahydrate
Tetramethylammonium hydroxide (CAS 75-59-2) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C4H13NO and a molecular weight of 91.152 g/mol. Key properties include a boiling point of 110 °C, a density of 0.866 g/mL at 25 °C and a flash point of 26.7 °C. It is classified under GHS with signal word Danger and hazard statements H226 — Flammable liquid and vapour, H300 and H310. No supplier offers are currently listed; request a quote. Record last updated Nov 2, 2026.
- CAS No.
- 75-59-2
- Jingsj CID
- J-1089529-1
- Molecular Formula
- C4H13NO
- Molecular Weight
- 91.152 g/mol
- Category
- Organic Compounds
- Last updated
- 11/2/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 110 °C |
|---|---|
| Density | 0.866 g/mL at 25 °C |
| Flash Point | 26.7 °C |
| Exact Mass | 91.099716 |
| PSA | 23.06000 |
| LogP | 0.14560 |
| Vapor Pressure | 17.5 mm Hg ( 20 °C) |
| Refractive Index | n20/D 1.384 |
| Stability | Stable. Flammable. Incompatible with strong oxidizing agents, strong acids. |
GHS Safety & Compliance
- H226 — Flammable liquid and vapour
- H300
- H310
- H314 — Causes severe skin burns and eye damage
- H331 — Toxic if inhaled
- H370 — Causes damage to organs
- H372 — Causes damage to organs through prolonged exposure
- H411 — Toxic to aquatic life with long lasting effects
Customs & Trade Information
| HS Code | 2923900090 |
|---|---|
| Summary | 2923900090 other quaternary ammonium salts and hydroxides。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:6.5%。General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of Tetramethylammonium hydroxide?
The CAS number of Tetramethylammonium hydroxide is 75-59-2.
What are the molecular formula and molecular weight of Tetramethylammonium hydroxide?
Tetramethylammonium hydroxide has molecular formula C4H13NO and molecular weight 91.152 g/mol.
Is Tetramethylammonium hydroxide hazardous?
Tetramethylammonium hydroxide has GHS signal word Danger and hazard statements H226 — Flammable liquid and vapour; H300; H310.
What are the upstream and downstream products of Tetramethylammonium hydroxide?
For Tetramethylammonium hydroxide, Upstream Products: Methanol, Dimethyl Carbonate, Trimethylamine; Downstream Products: Tetramethylammonium bicarbonate, Tetramethylammonium fluoride, Tetramethylammonium p-toluenesulfonate.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Tetramethylammonium hydroxide (CAS 75-59-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1089529-1 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.