2,5-Dimethyl-2,5-dihydroxy-1,4-dithiane

2,5-二甲基-2,5-二羟基-1,4-二噻烷

Also known as: 2,5-Dimethyl-1,4-dithiane-2,5-diol, 1-Mercaptopropanone (dimer), 2,5-Dihydroxy-2,5-dimethyl-1,4-dithiane, Cyclodithalfarol-705, FEMA 3450, UNII:N99176196Z

2,5-Dimethyl-2,5-dihydroxy-1,4-dithiane (CAS 55704-78-4) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C6H12O2S2 and a molecular weight of 180.288 g/mol. It is also known as 2,5-Dimethyl-1,4-dithiane-2,5-diol, 1-Mercaptopropanone (dimer) and 2,5-Dihydroxy-2,5-dimethyl-1,4-dithiane. Key properties include a melting point of 64 °C, a boiling point of 326.8±42.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 159.1±26.6 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 55704-78-4
Jingsj CID: J-38718-7
Molecular Formula: C₆H₁₂O₂S₂
Chinese Name: 2,5-二甲基-2,5-二羟基-1,4-二噻烷
Molecular Weight: 180.288 g/mol
Category: Aliphatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	64 °C
Boiling Point	326.8±42.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	159.1±26.6 °C

Frequently Asked Questions

What is the CAS number of 2,5-Dimethyl-2,5-dihydroxy-1,4-dithiane?

The CAS number of 2,5-Dimethyl-2,5-dihydroxy-1,4-dithiane is 55704-78-4.

What are the molecular formula and molecular weight of 2,5-Dimethyl-2,5-dihydroxy-1,4-dithiane?

2,5-Dimethyl-2,5-dihydroxy-1,4-dithiane has molecular formula C6H12O2S2 and molecular weight 180.288 g/mol.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "2,5-Dimethyl-2,5-dihydroxy-1,4-dithiane (CAS 55704-78-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-38718-7 (accessed 2026-10-22).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.