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1,1-Bis(methylthio)ethylene

Also known as: 1,1-Bis(methylthio)ethene, Bismethylthioethylene, Ketene Dimethyl Thioacetal, 1,1-Bis(methylsulfanyl)ethene, Ethene, 1,1-bis(methylthio)-, Ketene dimethyl dithioacetal, Thioketene dimethylacetal

1,1-Bis(methylthio)ethylene (CAS 51102-74-0) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C4H8S2 and a molecular weight of 120.23600 g/mol. Key properties include a boiling point of 188.6ºC at 760mmHg, a density of 1.024g/cm3 and a flash point of 70.4ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
51102-74-0
Jingsj CID
J-46255-5
Molecular Formula
C4H8S2
Molecular Weight
120.23600 g/mol
Category
Aliphatic Hydrocarbons
Last updated
8/21/2026
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Physicochemical Properties

Boiling Point188.6ºC at 760mmHg
Density1.024g/cm3
Flash Point70.4ºC
Exact Mass120.00700
PSA50.60000
LogP2.18360
Refractive Index1.527

Frequently Asked Questions

What is the CAS number of 1,1-Bis(methylthio)ethylene?

The CAS number of 1,1-Bis(methylthio)ethylene is 51102-74-0.

What are the molecular formula and molecular weight of 1,1-Bis(methylthio)ethylene?

1,1-Bis(methylthio)ethylene has molecular formula C4H8S2 and molecular weight 120.23600 g/mol.

What are the upstream and downstream products of 1,1-Bis(methylthio)ethylene?

For 1,1-Bis(methylthio)ethylene, Upstream Products: Dimethyl sulfate, Carbon disulphide, Methylmagnesium bromide; Downstream Products: Methanethiol, S-Methyl thioacetate.

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

Last updated:

How to cite: Jingsj. "1,1-Bis(methylthio)ethylene (CAS 51102-74-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-46255-5 (accessed 2026-11-09).

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