3-Methyl-4-bromopyrazole
4-bromo-3-methyl-1H-pyrazole
CAS: 13808-64-5
Molecular Formula: C4H5BrN2
3-Methyl-4-bromopyrazole - Names and Identifiers
| Name | 4-bromo-3-methyl-1H-pyrazole |
| Synonyms | TIMTEC-BB SBB003957 4-BROMO-3-METHYLPYRAZOLE 4-Bromo-3-methylpyrazole 3-Methyl-4-bromopyrazole 4-Bromo-3-methyl pyrazole 4-bromo-3-methyl-1H-pyrazole 3-Methyl-4-bromo-1H-pyrazole 4-BROMO-3-METHYL-1H-PYRAZOLE 4-bromo-5-methyl-1H-pyrazole 1H-Pyrazole, 4-bromo-3-methyl- |
| CAS | 13808-64-5 |
| EINECS | 237-456-7 |
| InChI | InChI=1/C4H5BrN2/c1-3-4(5)2-6-7-3/h2H,1H3,(H,6,7) |
3-Methyl-4-bromopyrazole - Physico-chemical Properties
| Molecular Formula | C4H5BrN2 |
| Molar Mass | 161 |
| Density | 1.5638 |
| Melting Point | 77-79°C |
| Boling Point | 259.9±20.0 °C(Predicted) |
| Flash Point | 111°C |
| Solubility | methanol: soluble0.25g/5mL, clear, colorless to yellow |
| Vapor Presure | 0.0204mmHg at 25°C |
| Appearance | Crystalline powder |
| Color | White to cream |
| pKa | 13.27±0.50(Predicted) |
| Storage Condition | Keep in dark place,Inert atmosphere,Room temperature |
| Sensitive | Sensitive to air |
| Refractive Index | 1.5182 (estimate) |
| MDL | MFCD00005241 |
| Physical and Chemical Properties | 3-Methyl-4-bromopyrazole |
3-Methyl-4-bromopyrazole - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S37/39 - Wear suitable gloves and eye/face protection S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. |
| WGK Germany | 3 |
| HS Code | 29349990 |
| Hazard Class | IRRITANT |
3-Methyl-4-bromopyrazole - Introduction
4-Bromo-3-methylpyrazole (chemical formula C5H5NBr) is an organic compound. The following is a description of the properties, uses, preparation and safety information of the compound:
Nature:
4-Bromo-3-methylpyrazole is a colorless to pale yellow crystal, slightly soluble in water. It has a density of 1.75g/cm³ and a melting point of 79-81°C. This compound can be oxidized in air. It is an organic halide and has certain toxicity.
Use:
4-Bromo-3-methylpyrazole is mainly used as an intermediate in organic synthesis. It can be used in the synthesis of pyrazole compounds, anthraquinone compounds, etc. In addition, it can also be used for research in the field of pesticides and pharmaceuticals.
Preparation Method:
4-Bromo-3-methylpyrazole can be prepared by reacting pyridine with methyl bromide. Specific steps are as follows:
1. Add pyridine and methyl bromide to the reaction vessel.
2. Reaction for several hours under mild reaction conditions.
3. 4-Bromo-3-methylpyrazole crystals can be obtained by filtration and crystallization.
Safety Information:
4-Bromo-3-methylpyrazole has certain toxicity, so the following safety precautions should be paid attention to when using and storing:
1. avoid skin contact and inhalation. Wear appropriate protective gloves and masks during operation.
2. storage to avoid contact with oxidants, organic acids, organic bases and other substances.
3. If you come into contact with the compound, rinse immediately with plenty of water and seek medical help.
4. It is strictly prohibited to dump in the natural environment, and the residues and wastes should be properly disposed of in accordance with local regulations.
Please note that when using and handling chemicals, it is important to follow appropriate safety procedures and acquire relevant knowledge and laboratory techniques in advance to ensure safety.
Nature:
4-Bromo-3-methylpyrazole is a colorless to pale yellow crystal, slightly soluble in water. It has a density of 1.75g/cm³ and a melting point of 79-81°C. This compound can be oxidized in air. It is an organic halide and has certain toxicity.
Use:
4-Bromo-3-methylpyrazole is mainly used as an intermediate in organic synthesis. It can be used in the synthesis of pyrazole compounds, anthraquinone compounds, etc. In addition, it can also be used for research in the field of pesticides and pharmaceuticals.
Preparation Method:
4-Bromo-3-methylpyrazole can be prepared by reacting pyridine with methyl bromide. Specific steps are as follows:
1. Add pyridine and methyl bromide to the reaction vessel.
2. Reaction for several hours under mild reaction conditions.
3. 4-Bromo-3-methylpyrazole crystals can be obtained by filtration and crystallization.
Safety Information:
4-Bromo-3-methylpyrazole has certain toxicity, so the following safety precautions should be paid attention to when using and storing:
1. avoid skin contact and inhalation. Wear appropriate protective gloves and masks during operation.
2. storage to avoid contact with oxidants, organic acids, organic bases and other substances.
3. If you come into contact with the compound, rinse immediately with plenty of water and seek medical help.
4. It is strictly prohibited to dump in the natural environment, and the residues and wastes should be properly disposed of in accordance with local regulations.
Please note that when using and handling chemicals, it is important to follow appropriate safety procedures and acquire relevant knowledge and laboratory techniques in advance to ensure safety.
Last Update：2024-04-09 20:49:11
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