ethyl 5-cyano-3,4-dimethylthieno[2,3-b]thiophene-2-carboxylate

5-氰基-3,4-二甲基噻吩并[2,3-b]噻吩-2-羧酸乙酯

Also known as: ethyl 2-cyano-3,4-dimethylthieno[2,3-b]thiophene-5-carboxylate, thieno[2,3-b]thiophene-2-carboxylic acid, 5-cyano-3,4-dimethyl-, ethyl ester, HMS554D12, ethyl 5-cyano-3

ethyl 5-cyano-3,4-dimethylthieno[2,3-b]thiophene-2-carboxylate (CAS 175202-57-0) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C12H11NO2S2 and a molecular weight of 265.35100 g/mol. It is also known as ethyl 2-cyano-3,4-dimethylthieno[2,3-b]thiophene-5-carboxylate, thieno[2,3-b]thiophene-2-carboxylic acid, 5-cyano-3,4-dimethyl-, ethyl ester and HMS554D12. Key properties include a melting point of 155ºC, a boiling point of 421.9ºC at 760mmHg, a density of 1.33g/cm3 and a flash point of 209ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

175202-57-0

Jingsj CID

J-1379417-2

Molecular Formula

C₁₂H₁₁NO₂S₂

Chinese Name

5-氰基-3,4-二甲基噻吩并[2,3-b]噻吩-2-羧酸乙酯

Molecular Weight

265.35100 g/mol

Category

Pharma Intermediates

Last updated

8/21/2026