2-Methylthieno[2,3-d]pyrimidin-4(3H)-one

2-甲基-3H-噻吩并[2,3-d]嘧啶-4-酮

Also known as: 2-Methyl-3,4-dihydro-4-oxothieno[2,3-d]pyrimidine, 2-Methyl-3H-thieno[2,3-d]pyrimidin-4-one, 2-Methyl-4-oxo-3,4-dihydro-thieno<2,3-d>pyrimidin, 2-Methylthieno[2,3-d]pyrimidin-4-ol, Thieno[2,3-d]pyrimidin-4(3H)-one, 2-methyl-

2-Methylthieno[2,3-d]pyrimidin-4(3H)-one (CAS 21582-51-4) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C7H6N2OS and a molecular weight of 166.200 g/mol. It is also known as 2-Methyl-3,4-dihydro-4-oxothieno[2,3-d]pyrimidine, 2-Methyl-3H-thieno[2,3-d]pyrimidin-4-one and 2-Methyl-4-oxo-3,4-dihydro-thieno<2,3-d>pyrimidin. Key properties include a melting point of 204-206℃, a boiling point of 406.7±33.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 199.8±25.4 °C. GHS signal word: Warning. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

21582-51-4

Jingsj CID

J-1013505-5

Molecular Formula

C₇H₆N₂OS

Chinese Name

2-甲基-3H-噻吩并[2,3-d]嘧啶-4-酮

Molecular Weight

166.200 g/mol

Category

Pharma Intermediates

Last updated

8/21/2026