Benzo[b]thiophene-2,3-dione

1-苯并噻吩-2,3-二酮

Also known as: 1-benzothiophene-2,3-dione, 2,3-Benzo[b]thiophenedione, 2,3-Dihydro-1-benzothiophene-2,3-dione, 2,3-Dioxo-2,3-dihydrothionaphthene, 2,3-Thionaphthenequinone, 2,3-dihydrobenzo[b]thiophene-2,3-dione, Benzo(b)thiophene-2,3-dione, Benzothiophene-2,3-dione, NSC 114478, Thianaphthenequinone, Thioisatin, Thionaphthenquinone, Thionaphthoquinone, benzo[b]thiophene-2,3-quinone, benzothiophene-2,3-quinone

Benzo[b]thiophene-2,3-dione (CAS 493-57-2) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C8H4O2S and a molecular weight of 164.18100 g/mol. It is also known as 1-benzothiophene-2,3-dione, 2,3-Benzo[b]thiophenedione and 2,3-Dihydro-1-benzothiophene-2,3-dione. Key properties include a melting point of 119-121ºC, a boiling point of 247ºC at 760mmHg, a density of 1.479g/cm3 and a flash point of 103ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

493-57-2

Jingsj CID

J-1071837-7

Molecular Formula

C₈H₄O₂S

Chinese Name

1-苯并噻吩-2,3-二酮

Molecular Weight

164.18100 g/mol

Category

Pharma Intermediates

Last updated

8/21/2026