tert-Butyl methyl ether
Also known as: Methyl tert-butyl ether, MTBE, TBME, 2-Methoxy-2-methylpropane, Methyl tertiary-butyl ether, tert-Butyl methyl ether, t-Butyl methyl ether, 2-Methyl-2-methoxypropane
tert-Butyl methyl ether (CAS 1634-04-4) is a compound in the Ethers category listed in the Jingsj chemical database. It has the molecular formula C5H12O and a molecular weight of 88.148 g/mol. Key properties include a melting point of -110 °C, a boiling point of 55.2±0.0 °C at 760 mmHg, a density of 0.8±0.1 g/cm3 and a flash point of -10.0±0.0 °C. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour and H315 — Causes skin irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 1634-04-4
- Jingsj CID
- J-32906-0
- Molecular Formula
- C5H12O
- Molecular Weight
- 88.148 g/mol
- Category
- Ethers
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -110 °C |
|---|---|
| Boiling Point | 55.2±0.0 °C at 760 mmHg |
| Density | 0.8±0.1 g/cm3 |
| Flash Point | -10.0±0.0 °C |
| Exact Mass | 88.088814 |
| PSA | 9.23000 |
| LogP | 1.15 |
| Additional Property | 3.1 (vs air) |
| Vapor Pressure | 251.3±0.1 mmHg at 25°C |
| Refractive Index | 1.375 |
| Additional Property | 51 g/L (20 ºC) |
| Additional Property | -108.6℃ |
GHS Safety & Compliance
- H225 — Highly flammable liquid and vapour
- H315 — Causes skin irritation
Customs & Trade Information
| HS Code | 2909199090 |
|---|---|
| Summary | 2909199090. other acyclic ethers and their halogenated, sulphonated, nitrated or nitrosated derivatives. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:5.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of tert-Butyl methyl ether?
The CAS number of tert-Butyl methyl ether is 1634-04-4.
What are the molecular formula and molecular weight of tert-Butyl methyl ether?
tert-Butyl methyl ether has molecular formula C5H12O and molecular weight 88.148 g/mol.
Is tert-Butyl methyl ether hazardous?
tert-Butyl methyl ether has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour; H315 — Causes skin irritation.
What are the upstream and downstream products of tert-Butyl methyl ether?
For tert-Butyl methyl ether, Upstream Products: 4-(Chloromethyl)benzoic acid, tert-Butanol, iodomethane; Downstream Products: 1,1,1,2,3,3,3-heptafluoro-2-(trifluoromethyl)propane, 4-Chloro-6,7-dimethoxyquinoline, 3,5-Difluoroaniline.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "tert-Butyl methyl ether (CAS 1634-04-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-32906-0 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.