2,5-Dimethylthiophene
Also known as: 2,5-Dimethylthiophen, 2,5-Thioxene, 2,5-DiMethylthiophene, 2,5-SC4H2Me2, 3,5-methylthiophene, Thiophene, 2,5-dimethyl-, MFCD00005452, EINECS 211-313-9
2,5-Dimethylthiophene (CAS 638-02-8) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C6H8S and a molecular weight of 112.193 g/mol. Key properties include a melting point of -63°C, a boiling point of 136.8±9.0 °C at 760 mmHg, a density of 1.0±0.1 g/cm3 and a flash point of 23.9±0.0 °C. It is classified under GHS with signal word Warning and hazard statements H226 — Flammable liquid and vapour. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 638-02-8
- Jingsj CID
- J-1398207-5
- Molecular Formula
- C6H8S
- Molecular Weight
- 112.193 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -63°C |
|---|---|
| Boiling Point | 136.8±9.0 °C at 760 mmHg |
| Density | 1.0±0.1 g/cm3 |
| Flash Point | 23.9±0.0 °C |
| Exact Mass | 112.034668 |
| PSA | 28.24000 |
| LogP | 2.82 |
| Vapor Pressure | 9.0±0.2 mmHg at 25°C |
| Refractive Index | 1.527 |
GHS Safety & Compliance
- H226 — Flammable liquid and vapour
Customs & Trade Information
| HS Code | 2934999090 |
|---|---|
| Summary | 2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of 2,5-Dimethylthiophene?
The CAS number of 2,5-Dimethylthiophene is 638-02-8.
What are the molecular formula and molecular weight of 2,5-Dimethylthiophene?
2,5-Dimethylthiophene has molecular formula C6H8S and molecular weight 112.193 g/mol.
Is 2,5-Dimethylthiophene hazardous?
2,5-Dimethylthiophene has GHS signal word Warning and hazard statements H226 — Flammable liquid and vapour.
What are the upstream and downstream products of 2,5-Dimethylthiophene?
For 2,5-Dimethylthiophene, Upstream Products: 2,5-Hexanedione, 2,5-Dimethylfuran, 5-Methyl-2-thiophenecarboxaldehyde; Downstream Products: thiophene-2,5-dicarboxylic acid, 3,4-bis(chloromethyl)-2,5-dimethylthiophene, 2-chloro-1-(2,5-dimethylthiophen-3-yl)ethanone.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "2,5-Dimethylthiophene (CAS 638-02-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1398207-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.