4-Chloro-6-methylthieno[2,3-d]pyrimidine

4-氯-6-甲基噻吩并[2,3-d]嘧啶

Also known as: Thieno[2,3-d]pyrimidine, 4-chloro-6-methyl-, 6-Methyl-4-chlorothieno[2,3-d]pyrimidine, 4-chloro-6-methylthieno<2,3-d>pyrimidine, RW3777, AKOS 92593

4-Chloro-6-methylthieno[2,3-d]pyrimidine (CAS 106691-21-8) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C7H5ClN2S and a molecular weight of 184.646 g/mol. It is also known as Thieno[2,3-d]pyrimidine, 4-chloro-6-methyl-, 6-Methyl-4-chlorothieno[2,3-d]pyrimidine and 4-chloro-6-methylthieno<2,3-d>pyrimidine. Key properties include a melting point of 88-91℃ (sublm), a boiling point of 301.3±37.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 136.0±26.5 °C. GHS signal word: Warning. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
106691-21-8
Jingsj CID
J-1307770-5
Molecular Formula
C7H5ClN2S
Chinese Name
4-氯-6-甲基噻吩并[2,3-d]嘧啶
Molecular Weight
184.646 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026

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Physicochemical Properties

Melting Point88-91℃ (sublm)
Boiling Point301.3±37.0 °C at 760 mmHg
Density1.4±0.1 g/cm3
Flash Point136.0±26.5 °C

GHS Safety & Compliance

IrritantSignal word: Warning

Frequently Asked Questions

What is the CAS number of 4-Chloro-6-methylthieno[2,3-d]pyrimidine?

The CAS number of 4-Chloro-6-methylthieno[2,3-d]pyrimidine is 106691-21-8.

What are the molecular formula and molecular weight of 4-Chloro-6-methylthieno[2,3-d]pyrimidine?

4-Chloro-6-methylthieno[2,3-d]pyrimidine has molecular formula C7H5ClN2S and molecular weight 184.646 g/mol.

Is 4-Chloro-6-methylthieno[2,3-d]pyrimidine hazardous?

4-Chloro-6-methylthieno[2,3-d]pyrimidine has GHS signal word Warning.

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

Last updated:

How to cite: Jingsj. "4-Chloro-6-methylthieno[2,3-d]pyrimidine (CAS 106691-21-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1307770-5 (accessed 2026-10-25).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.