4,5-Methylenedithio-1,3-dithiol-2-one

Also known as: [1,3]Dithiolo[4,5-d][1,3]dithiol-2-one, 4,5-Methylenedithio-1,3-dithiol-2-one, 4,5-Methylenedithio-1,3-dithiol-2-one (ketone)

4,5-Methylenedithio-1,3-dithiol-2-one (CAS 85720-62-3) is a compound in the Alcohols category listed in the Jingsj chemical database. It has the molecular formula C4H2OS4 and a molecular weight of 194.31800 g/mol. Key properties include a boiling point of 398.8ºC at 760 mmHg, a density of 1.86g/cm3 and a flash point of 198.6ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 85720-62-3
Jingsj CID: J-37063-8
Molecular Formula: C₄H₂OS₄
Molecular Weight: 194.31800 g/mol
Category: Alcohols
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	398.8ºC at 760 mmHg
Density	1.86g/cm3
Flash Point	198.6ºC
Exact Mass	193.89900
PSA	124.15000
LogP	2.32510
Refractive Index	1.892

Customs & Trade Information

HS Code	2930909090
Summary	2930909090. other organo-sulphur compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of 4,5-Methylenedithio-1,3-dithiol-2-one?

The CAS number of 4,5-Methylenedithio-1,3-dithiol-2-one is 85720-62-3.

What are the molecular formula and molecular weight of 4,5-Methylenedithio-1,3-dithiol-2-one?

4,5-Methylenedithio-1,3-dithiol-2-one has molecular formula C4H2OS4 and molecular weight 194.31800 g/mol.

What are the upstream and downstream products of 4,5-Methylenedithio-1,3-dithiol-2-one?

For 4,5-Methylenedithio-1,3-dithiol-2-one, Upstream Products: 4,5-Methylenedithio-1,3-dithiole-2-thione; Downstream Products: Bis(trimethylenedithio)tetrathiafulvalene, bis(methylenedithio)tetrathiafulvalene, BEDO-TTF.

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

Last updated: 8/21/2026

How to cite: Jingsj. "4,5-Methylenedithio-1,3-dithiol-2-one (CAS 85720-62-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-37063-8 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.