5,6-Dimethylthieno[2,3-d]pyrimidin-4-amine

Also known as: 5,6-Dimethylthieno[2,3-d]pyrimidin-4-ylamine, 4-Amino-5,6-dimethylthieno[2,3-d]pyrimidine, 5,6-Dimethylthieno(2,3-d)pyrimidin-4-amine

5,6-Dimethylthieno[2,3-d]pyrimidin-4-amine (CAS 4994-89-2) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C8H9N3S and a molecular weight of 179.24200 g/mol. Key properties include a boiling point of 371.9ºC at 760 mmHg, a density of 1.334g/cm3 and a flash point of 178.7ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 4994-89-2
Jingsj CID: J-1014968-5
Molecular Formula: C₈H₉N₃S
Molecular Weight: 179.24200 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	371.9ºC at 760 mmHg
Density	1.334g/cm3
Flash Point	178.7ºC
Exact Mass	179.05200
PSA	80.04000
LogP	2.47150
Refractive Index	1.711

Customs & Trade Information

HS Code	2934999090
Summary	2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of 5,6-Dimethylthieno[2,3-d]pyrimidin-4-amine?

The CAS number of 5,6-Dimethylthieno[2,3-d]pyrimidin-4-amine is 4994-89-2.

What are the molecular formula and molecular weight of 5,6-Dimethylthieno[2,3-d]pyrimidin-4-amine?

5,6-Dimethylthieno[2,3-d]pyrimidin-4-amine has molecular formula C8H9N3S and molecular weight 179.24200 g/mol.

What are the upstream and downstream products of 5,6-Dimethylthieno[2,3-d]pyrimidin-4-amine?

For 5,6-Dimethylthieno[2,3-d]pyrimidin-4-amine, Upstream Products: 2-Amino-4,5-dimethylthiophene-3-carbonitrile, Methanimidic acid, (Z)-, 5,6-Dimethylthieno[2,3-d]pyrimidin-4(3H)-one.

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

Last updated: 8/21/2026

How to cite: Jingsj. "5,6-Dimethylthieno[2,3-d]pyrimidin-4-amine (CAS 4994-89-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1014968-5 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.