4-Chloro-1-methyl-1H-pyrazole-5-carbonyl chloride
4-氯-1-甲基-1H-吡唑-5-羰酰氯
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. It is also known as 1H-Pyrazole-5-carbonyl chloride, 4-chloro-1-methyl- (9CI) and 4-chloro-2-methylpyrazole-3-carbonyl chloride. 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-1513280-0
- Molecular Formula
- C5H4Cl2N2O
- Chinese Name
- 4-氯-1-甲基-1H-吡唑-5-羰酰氯
- 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 |
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.
Data compiled from public chemical databases 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-1513280-0 (accessed 2026-10-22).
Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.