4-Chloro-1-methyl-1H-pyrazole-5-carbonyl chloride
Also known as: 1H-Pyrazole-5-carbonyl chloride, 4-chloro-1-methyl- (9CI), 4-chloro-2-methylpyrazole-3-carbonyl chloride
4-Chloro-1-methyl-1H-pyrazole-5-carbonyl chloride (CAS 157142-50-2) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H4Cl2N2O and a molecular weight of 179.00400 g/mol. Key properties include a boiling point of 264.6ºC at 760 mmHg, a density of 1.55g/cm3 and a flash point of 113.8ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 157142-50-2
- Jingsj CID
- J-1513280-6
- Molecular Formula
- C5H4Cl2N2O
- Molecular Weight
- 179.00400 g/mol
- Category
- Pharma Intermediates
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Boiling Point | 264.6ºC at 760 mmHg |
|---|---|
| Density | 1.55g/cm3 |
| Flash Point | 113.8ºC |
| Exact Mass | 177.97000 |
| PSA | 34.89000 |
| LogP | 1.45250 |
| Vapor Pressure | 0.00964mmHg at 25°C |
| Refractive Index | 1.611 |
Customs & Trade Information
| HS Code | 2933199090 |
|---|---|
| Summary | 2933199090. other compounds containing an unfused pyrazole ring (whether or not hydrogenated) in the structure. 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-Chloro-1-methyl-1H-pyrazole-5-carbonyl chloride?
The CAS number of 4-Chloro-1-methyl-1H-pyrazole-5-carbonyl chloride is 157142-50-2.
What are the molecular formula and molecular weight of 4-Chloro-1-methyl-1H-pyrazole-5-carbonyl chloride?
4-Chloro-1-methyl-1H-pyrazole-5-carbonyl chloride has molecular formula C5H4Cl2N2O and molecular weight 179.00400 g/mol.
What are the upstream and downstream products of 4-Chloro-1-methyl-1H-pyrazole-5-carbonyl chloride?
For 4-Chloro-1-methyl-1H-pyrazole-5-carbonyl chloride, Upstream Products: 4-Chloro-1-methyl-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. "4-Chloro-1-methyl-1H-pyrazole-5-carbonyl chloride (CAS 157142-50-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1513280-6 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.