5,5'-Dimethyl-2,2'-bithiophene

Also known as: 2,2'-Bithiophene, 5,5'-dimethyl-, 2-methyl-5-(5-methylthiophen-2-yl)thiophene, 5,5'-dimethyl-2,2'-bithiophenyl, 5,5'-dimethyl-2,2'-bisthiophene, MFCD01927313

5,5'-Dimethyl-2,2'-bithiophene (CAS 16303-58-5) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C10H10S2 and a molecular weight of 194.316 g/mol. Key properties include a melting point of 64ºC, a boiling point of 262.9±35.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 81.8±12.2 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 16303-58-5
Jingsj CID: J-21344-5
Molecular Formula: C₁₀H₁₀S₂
Molecular Weight: 194.316 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	64ºC
Boiling Point	262.9±35.0 °C at 760 mmHg
Density	1.2±0.1 g/cm3
Flash Point	81.8±12.2 °C
Exact Mass	194.022385
PSA	56.48000
LogP	4.51
Vapor Pressure	0.0±0.5 mmHg at 25°C
Refractive Index	1.605

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 5,5'-Dimethyl-2,2'-bithiophene?

The CAS number of 5,5'-Dimethyl-2,2'-bithiophene is 16303-58-5.

What are the molecular formula and molecular weight of 5,5'-Dimethyl-2,2'-bithiophene?

5,5'-Dimethyl-2,2'-bithiophene has molecular formula C10H10S2 and molecular weight 194.316 g/mol.

What are the upstream and downstream products of 5,5'-Dimethyl-2,2'-bithiophene?

For 5,5'-Dimethyl-2,2'-bithiophene, Upstream Products: 2-Methylthiophene, 2-Iodo-5-methylthiophene, 2-Bromo-5-methylthiophene.

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. "5,5'-Dimethyl-2,2'-bithiophene (CAS 16303-58-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-21344-5 (accessed 2026-11-09).

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