Pyrazole-5-carboxylic acid, 3-methyl- - Names and Identifiers
Name | 1H-Pyrazole-3-carboxylicacid, 5-methyl-
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Synonyms | 3-Methyl-5-pyrazolecarboxylic acid 5-methylpyrazole-3-carboxylic acid Pyrazole-5-carboxylic acid, 3-methyl- Pyrazole-3-carboxylic acid, 5-methyl- 3-METHYL-1H-PYRAZOLE-5-CARBOXYLIC ACID 3-methyl-1H-pyrazole-5-carboxylic acid 5-Methyl-1H-pyrazole-3-carboxylic acid 1H-Pyrazole-3-carboxylicacid, 5-methyl- 1H-Pyrazole-3-carboxylic acid, 5-Methyl- 5(or 3)-Methyl-pyrazole-3(or 5)-carboxylic Acid
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CAS | 402-61-9 696-22-0
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EINECS | 206-953-0 |
InChI | InChI=1/C5H6N2O2/c1-3-2-4(5(8)9)7-6-3/h2H,1H3,(H,6,7)(H,8,9) |
Pyrazole-5-carboxylic acid, 3-methyl- - Physico-chemical Properties
Molecular Formula | C5H6N2O2
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Molar Mass | 126.11 |
Density | 1.404 g/cm3 |
Melting Point | 236-240℃ |
Boling Point | 388.8 °C at 760 mmHg |
Flash Point | 188.9 °C |
Vapor Presure | 9.69E-07mmHg at 25°C |
Storage Condition | 2-8°C |
Refractive Index | 1.595 |
Pyrazole-5-carboxylic acid, 3-methyl- - Risk and Safety
Hazard Symbols | Xi - Irritant
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Risk Codes | R36/37/38 - Irritating to eyes, respiratory system and skin.
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Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S37/39 - Wear suitable gloves and eye/face protection
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Pyrazole-5-carboxylic acid, 3-methyl- - Introduction
It is an organic compound with the chemical formula C5H5N2O2. It is typically a colorless to pale yellow crystalline solid.
The compound has two functional groups, one is a pyrazole ring and the other is a carboxylic acid functional group. It has moderate solubility and is soluble in water and common organic solvents. The methyl group in its structure makes it hydrophobic.
As a heterocyclic compound, 5-methyl-has a variety of biological activities. It is widely used in pharmaceutical research and drug synthesis, often as a raw material or intermediate. Specific applications include the synthesis of vitamin B1 analogs, insecticides, plavix inhibitors (a compound used to inhibit plant growth), and the like.
Preparation, 5-methyl-can be obtained by reacting the nitrogen atom of the pyrazole ring with a methylating agent (e. g. methyl iodide). This method is carried out by an N-methylation reaction, the common method being the reaction of the corresponding nucleophile with an N-methyl reagent.
Last Update:2024-04-09 02:00:45