4,5-dimethyl-1,3,2-dioxathiolane 2-oxide
4,5-二甲基-1,3,2-二氧硫杂环戊烷 2-氧化物
Also known as: sym-Dimethylethylene sulfite, 2,3-Butanediol, cyclic sulfite, 2,3-butylene sulfite, 4,5-Dimethyl-1,3,2-dioxathiolan-2-oxid, 4,5-Dimethyl-1,3-dioxa-2-thiolan-2-oxid
4,5-dimethyl-1,3,2-dioxathiolane 2-oxide (CAS 4440-90-8) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C4H8O3S and a molecular weight of 136.17000 g/mol. It is also known as sym-Dimethylethylene sulfite, 2,3-Butanediol, cyclic sulfite and 2,3-butylene sulfite. Key properties include a boiling point of 176.3ºC at 760 mmHg, a density of 1.35g/cm3 and a flash point of 60.4ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 4440-90-8
- Jingsj CID
- J-24979-1
- Molecular Formula
- C4H8O3S
- Chinese Name
- 4,5-二甲基-1,3,2-二氧硫杂环戊烷 2-氧化物
- Molecular Weight
- 136.17000 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 176.3ºC at 760 mmHg |
|---|---|
| Density | 1.35g/cm3 |
| Flash Point | 60.4ºC |
Frequently Asked Questions
What is the CAS number of 4,5-dimethyl-1,3,2-dioxathiolane 2-oxide?
The CAS number of 4,5-dimethyl-1,3,2-dioxathiolane 2-oxide is 4440-90-8.
What are the molecular formula and molecular weight of 4,5-dimethyl-1,3,2-dioxathiolane 2-oxide?
4,5-dimethyl-1,3,2-dioxathiolane 2-oxide has molecular formula C4H8O3S and molecular weight 136.17000 g/mol.
Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "4,5-dimethyl-1,3,2-dioxathiolane 2-oxide (CAS 4440-90-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-24979-1 (accessed 2026-10-23).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.