3-Methyl-5-(thiophen-2-yl)-1H-pyrazole
Also known as: 3-METHYL-5-(2-THIENYL)-1H-PYRAZOLE, 1H-Pyrazole, 3-methyl-5-(2-thienyl)-, 3-methyl-5-(thiophen-2-yl)-1H-pyrazole, 5-methyl-3-thiophen-2-yl-1H-pyrazole, 3-Methyl-5-thien-2-yl-1H-pyrazole, 3-Methyl-5-thiophen-2-yl-pyrazole, 2-(3-methylpyrazol-5-yl)thiophene
3-Methyl-5-(thiophen-2-yl)-1H-pyrazole (CAS 31618-80-1) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C8H8N2S and a molecular weight of 164.22800 g/mol. Key properties include a melting point of 140-141ºC, a boiling point of 335.3ºC at 760mmHg, a density of 1.243g/cm3 and a flash point of 158.7ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 31618-80-1
- Jingsj CID
- J-1178296-0
- Molecular Formula
- C8H8N2S
- Molecular Weight
- 164.22800 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 140-141ºC |
|---|---|
| Boiling Point | 335.3ºC at 760mmHg |
| Density | 1.243g/cm3 |
| Flash Point | 158.7ºC |
| Exact Mass | 164.04100 |
| PSA | 56.92000 |
| LogP | 2.44660 |
| Refractive Index | 1.623 |
| Storage Conditions | 2-8°C |
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 3-Methyl-5-(thiophen-2-yl)-1H-pyrazole?
The CAS number of 3-Methyl-5-(thiophen-2-yl)-1H-pyrazole is 31618-80-1.
What are the molecular formula and molecular weight of 3-Methyl-5-(thiophen-2-yl)-1H-pyrazole?
3-Methyl-5-(thiophen-2-yl)-1H-pyrazole has molecular formula C8H8N2S and molecular weight 164.22800 g/mol.
What are the upstream and downstream products of 3-Methyl-5-(thiophen-2-yl)-1H-pyrazole?
For 3-Methyl-5-(thiophen-2-yl)-1H-pyrazole, Upstream Products: 1-(2-Thienyl)-1,3-butanedione; Downstream Products: 3-Methyl-4-nitro-1H-pyrazole-5-carboxylic acid.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "3-Methyl-5-(thiophen-2-yl)-1H-pyrazole (CAS 31618-80-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1178296-0 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.