![Molecular structure of 3,3-dimethyl-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine (CAS 255901-50-9)](/images/chem_structures_svg/428/255901-50-9.svg)
3,3-dimethyl-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine
Also known as: 3,4-(2,2-Dimethylpropylenedioxy)thiophene, 2H-Thieno[3,4-b][1,4]dioxepin, 3,4-dihydro-3,3-dimethyl-, 3,3-Dimethyl-2,4-dihydrothieno[3,4-b][1,4]dioxepine, EDOT analog, MFCD08705268
3,3-dimethyl-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine (CAS 255901-50-9) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C9H12O2S and a molecular weight of 184.25500 g/mol. Key properties include a melting point of 41-46ºC, a boiling point of 239.573ºC at 760 mmHg, a density of 1.124g/cm3 and a flash point of 98.3 °C. No supplier offers are currently listed; request a quote. Record last updated Nov 2, 2026.
- CAS No.
- 255901-50-9
- Jingsj CID
- J-1104612-1
- Molecular Formula
- C9H12O2S
- Molecular Weight
- 184.25500 g/mol
- Category
- Pharma Intermediates
- Last updated
- 11/2/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 41-46ºC |
|---|---|
| Boiling Point | 239.573ºC at 760 mmHg |
| Density | 1.124g/cm3 |
| Flash Point | 98.3 °C |
| Exact Mass | 184.05600 |
| PSA | 46.70000 |
| LogP | 2.54550 |
| Vapor Pressure | 0.062mmHg at 25°C |
| Refractive Index | 1.514 |
Frequently Asked Questions
What is the CAS number of 3,3-dimethyl-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine?
The CAS number of 3,3-dimethyl-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine is 255901-50-9.
What are the molecular formula and molecular weight of 3,3-dimethyl-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine?
3,3-dimethyl-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine has molecular formula C9H12O2S and molecular weight 184.25500 g/mol.
What are the upstream and downstream products of 3,3-dimethyl-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine?
For 3,3-dimethyl-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine, Upstream Products: 3,4-Dimethoxythiophene, Neopentyl glycol.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3,3-dimethyl-3,4-dihydro-2H-thieno[3,4-b][1,4]dioxepine (CAS 255901-50-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1104612-1 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.