2,3-dihydrothieno[3,4-b][1,4]dioxine-5-carbaldehyde

3,4-乙撑基二氧甲醛噻吩

Also known as: 3,4-ethylenedioxythiophene-2-carbaldehyde, 2,3-dihydrothieno[3,4-b]-1,4-dioxin-5-carbaldehyde, 2-formyl-3,4-ethylenedioxythiophene, thieno[3,4-b]-1,4-dioxin-5-carboxaldehyde, 2,3-dihydro-, 3,4-ethylenedioxothiophene-2-carbaldehyde

2,3-dihydrothieno[3,4-b][1,4]dioxine-5-carbaldehyde (CAS 204905-77-1) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C7H6O3S and a molecular weight of 170.186 g/mol. It is also known as 3,4-ethylenedioxythiophene-2-carbaldehyde, 2,3-dihydrothieno[3,4-b]-1,4-dioxin-5-carbaldehyde and 2-formyl-3,4-ethylenedioxythiophene. Key properties include a melting point of 138ºC, a boiling point of 311.2±42.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 142.0±27.9 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

204905-77-1

Jingsj CID

J-1055794-1

Molecular Formula

C₇H₆O₃S

Chinese Name

3,4-乙撑基二氧甲醛噻吩

Molecular Weight

170.186 g/mol

Category

Pharma Intermediates

Last updated

8/21/2026