4-bromothiophene-3-carbaldehyde

Also known as: 3-bromo-4-formylthiophene, 4-bromothiophene-3-carboxaldehyde, 4-bromo-3-thenaldehyde, 4-bromo-3-formylthiophene, 4-bromo-3-thiophenecarbaldehyde, 3-bromo-4-thiophenecarbaldehyde, 3-formyl-4-bromothiophene

4-bromothiophene-3-carbaldehyde (CAS 18791-78-1) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H3BrOS and a molecular weight of 191.04600 g/mol. Key properties include a boiling point of 237.9ºC at 760 mmHg, a density of 1.789 g/cm3 and a flash point of 97.7ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 18791-78-1
Jingsj CID: J-1516599-8
Molecular Formula: C₅H₃BrOS
Molecular Weight: 191.04600 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	237.9ºC at 760 mmHg
Density	1.789 g/cm3
Flash Point	97.7ºC
Exact Mass	189.90900
PSA	45.31000
LogP	2.32310
Vapor Pressure	0.0437mmHg at 25°C
Refractive Index	1.652

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 4-bromothiophene-3-carbaldehyde?

The CAS number of 4-bromothiophene-3-carbaldehyde is 18791-78-1.

What are the molecular formula and molecular weight of 4-bromothiophene-3-carbaldehyde?

4-bromothiophene-3-carbaldehyde has molecular formula C5H3BrOS and molecular weight 191.04600 g/mol.

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. "4-bromothiophene-3-carbaldehyde (CAS 18791-78-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1516599-8 (accessed 2026-11-09).

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