methyl 3-methylbenzo[b]thiophene-2-carboxylate

Also known as: methyl 3-methyl-1-benzothiophene-2-carboxylate, Benzo[b]thiophene-2-carboxylic acid, 3-methyl-, methyl ester, MFCD02683110, methyl 3-methylbenzothiophene-2-carboxylate

methyl 3-methylbenzo[b]thiophene-2-carboxylate (CAS 3133-81-1) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C11H10O2S and a molecular weight of 206.26100 g/mol. Key properties include a melting point of 102-105ºC, a boiling point of 313ºC at 760 mmHg, a density of 1.233g/cm3 and a flash point of 143.1ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 3133-81-1
Jingsj CID: J-1506223-4
Molecular Formula: C₁₁H₁₀O₂S
Molecular Weight: 206.26100 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	102-105ºC
Boiling Point	313ºC at 760 mmHg
Density	1.233g/cm3
Flash Point	143.1ºC
Exact Mass	206.04000
PSA	54.54000
LogP	2.99630
Refractive Index	1.624

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 methyl 3-methylbenzo[b]thiophene-2-carboxylate?

The CAS number of methyl 3-methylbenzo[b]thiophene-2-carboxylate is 3133-81-1.

What are the molecular formula and molecular weight of methyl 3-methylbenzo[b]thiophene-2-carboxylate?

methyl 3-methylbenzo[b]thiophene-2-carboxylate has molecular formula C11H10O2S and molecular weight 206.26100 g/mol.

What are the upstream and downstream products of methyl 3-methylbenzo[b]thiophene-2-carboxylate?

For methyl 3-methylbenzo[b]thiophene-2-carboxylate, Upstream Products: 2-fluoro-1-phenylethanone, Methyl thioglycolate, Methanol; Downstream Products: 3-Methylbenzo[b]thiophene-2-carboxylic acid.

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. "methyl 3-methylbenzo[b]thiophene-2-carboxylate (CAS 3133-81-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1506223-4 (accessed 2026-11-09).

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