Methyl 4-((tert-butoxycarbonyl)amino)thiophene-3-carboxylate

Also known as: Methyl 4-Boc-aminothiophene-3-carboxylate, 4-tert-Butoxycarbonylaminothiophene-3-carboxylic acid methyl ester, 3-Thiophenecarboxylic acid, 4-[[(1,1-dimethylethoxy)carbonyl]amino]-, methyl ester, Methyl 4-{[(tert-butoxy)carbonyl]amino}thiophene-3-carboxylate, QC-5923, methyl 4-[(2-methylpropan-2-yl)oxycarbonylamino]thiophene-3-carboxylate

Methyl 4-((tert-butoxycarbonyl)amino)thiophene-3-carboxylate (CAS 161940-20-1) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C11H15NO4S and a molecular weight of 257.30600 g/mol. Key properties include a boiling point of 316.165ºC at 760 mmHg, a density of 1.25g/cm3 and a flash point of 145.012ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 161940-20-1
Jingsj CID: J-1306808-1
Molecular Formula: C₁₁H₁₅NO₄S
Molecular Weight: 257.30600 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	316.165ºC at 760 mmHg
Density	1.25g/cm3
Flash Point	145.012ºC
Exact Mass	257.07200
PSA	92.87000
LogP	2.95470
Vapor Pressure	0mmHg at 25°C
Refractive Index	1.557

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 4-((tert-butoxycarbonyl)amino)thiophene-3-carboxylate?

The CAS number of Methyl 4-((tert-butoxycarbonyl)amino)thiophene-3-carboxylate is 161940-20-1.

What are the molecular formula and molecular weight of Methyl 4-((tert-butoxycarbonyl)amino)thiophene-3-carboxylate?

Methyl 4-((tert-butoxycarbonyl)amino)thiophene-3-carboxylate has molecular formula C11H15NO4S and molecular weight 257.30600 g/mol.

What are the upstream and downstream products of Methyl 4-((tert-butoxycarbonyl)amino)thiophene-3-carboxylate?

For Methyl 4-((tert-butoxycarbonyl)amino)thiophene-3-carboxylate, Upstream Products: Methyl 4-aminothiophene-3-carboxylate, Di-tert-butyl dicarbonate, Methyl 4-aminothiophene-3-carboxylate hydrochloride; Downstream Products: 4-[[(tert-Butoxy)carbonyl]amino]-3-thiophenecarboxylic 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 4-((tert-butoxycarbonyl)amino)thiophene-3-carboxylate (CAS 161940-20-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1306808-1 (accessed 2026-11-09).

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