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5-Methyl-1-phenyl-1H-pyrazole-4-carboxylic acid

5-甲基-1-苯基-1H-吡唑-4-羧酸

Also known as: 5-Methyl-1-phenylpyrazole-4-carboxylic acid, 3-Methyl-2-phenylpyrazole-4-carboxylic acid, AKOS PAO-0331, BUTTPARK 33\08-16, CBI-BB ZERO/006129, MFCD00067831, RARECHEM AL BE 1317, SALOR-INT L317624-1EA

5-Methyl-1-phenyl-1H-pyrazole-4-carboxylic acid (CAS 91138-00-0) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C11H10N2O2 and a molecular weight of 202.20900 g/mol. It is also known as 5-Methyl-1-phenylpyrazole-4-carboxylic acid, 3-Methyl-2-phenylpyrazole-4-carboxylic acid and AKOS PAO-0331. Key properties include a melting point of 166-170 °C(lit.), a boiling point of 382.9ºC at 760 mmHg, a density of 1.24 g/cm3 and a flash point of 185.4ºC. GHS signal word: Warning. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
91138-00-0
Jingsj CID
J-28738-8
Molecular Formula
C11H10N2O2
Chinese Name
5-甲基-1-苯基-1H-吡唑-4-羧酸
Molecular Weight
202.20900 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026

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Physicochemical Properties

Melting Point166-170 °C(lit.)
Boiling Point382.9ºC at 760 mmHg
Density1.24 g/cm3
Flash Point185.4ºC

GHS Safety & Compliance

IrritantSignal word: Warning

Frequently Asked Questions

What is the CAS number of 5-Methyl-1-phenyl-1H-pyrazole-4-carboxylic acid?

The CAS number of 5-Methyl-1-phenyl-1H-pyrazole-4-carboxylic acid is 91138-00-0.

What are the molecular formula and molecular weight of 5-Methyl-1-phenyl-1H-pyrazole-4-carboxylic acid?

5-Methyl-1-phenyl-1H-pyrazole-4-carboxylic acid has molecular formula C11H10N2O2 and molecular weight 202.20900 g/mol.

Is 5-Methyl-1-phenyl-1H-pyrazole-4-carboxylic acid hazardous?

5-Methyl-1-phenyl-1H-pyrazole-4-carboxylic acid has GHS signal word Warning.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "5-Methyl-1-phenyl-1H-pyrazole-4-carboxylic acid (CAS 91138-00-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-28738-8 (accessed 2026-10-22).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.