Benzene, 1-ethynyl-2-methyl- (9CI)
1-ethynyl-2-methylbenzene
CAS: 766-47-2
Molecular Formula: C9H8
Benzene, 1-ethynyl-2-methyl- (9CI) - Names and Identifiers
| Name | 1-ethynyl-2-methylbenzene |
| Synonyms | 2-Ethynyltoluene 2-ethynyltoluene 2-ETHYNYLTOLUENE 97 2-Methyl phenylacetylene 1-ethynyl-2-methylbenzene Benzene,1-ethynyl-2-methyl- Benzene, 1-ethynyl-2-methyl- (9CI) 1-Ethynyl-2-methylbenzene, 2-Ethynyltoluene |
| CAS | 766-47-2 |
| EINECS | 628-795-5 |
| InChI | InChI=1/C9H8/c1-3-9-7-5-4-6-8(9)2/h1,4-7H,2H3 |
Benzene, 1-ethynyl-2-methyl- (9CI) - Physico-chemical Properties
| Molecular Formula | C9H8 |
| Molar Mass | 116.16 |
| Density | 0.93g/cm3 |
| Melting Point | 285 °C (decomp) |
| Boling Point | 170.7°C at 760 mmHg |
| Flash Point | 44°C |
| Vapor Presure | 1.93mmHg at 25°C |
| Refractive Index | 1.534 |
Benzene, 1-ethynyl-2-methyl- (9CI) - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | R10 - Flammable R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S16 - Keep away from sources of ignition. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
| UN IDs | UN 3295 3/PG 3 |
| WGK Germany | 3 |
Benzene, 1-ethynyl-2-methyl- (9CI) - Upstream Downstream Industry
Benzene, 1-ethynyl-2-methyl- (9CI) - Introduction
1-ethynyl-2-methylbenzene, also known as 1-ethynyl-2-methylbenzene, with the chemical formula C9H8, is an organic compound. The following is a description of the nature, use, preparation and safety information of the substance:
Nature:
1-ethynyl-2-methylbenzene is a colorless liquid with a fragrant odor. It has a density of about 0.869g/cm³, a boiling point of 144-145°C, and a melting point of -53°C. The molecular weight of this compound is 120.16g/mol.
Use:
1-ethynyl-2-methylbenzene has a wide range of applications in organic synthesis. It can be used as a reagent for the establishment of carbon-carbon bonds and for the synthesis of other organic compounds, such as drugs, dyes and pesticides. In addition, it can also be used as a solvent, an organic synthesis intermediate or a reactant.
Preparation Method:
1-ethynyl-2-methylbenzene can be prepared by the reaction of a benzyl halide with acetylene. Specific preparation methods include:
1. The benzyl halide reacts with triethylamine to generate sodium benzyl.
2. In the presence of ammonia, sodium benzyl reacts with acetylene to generate 1-ethynyl-2-methylbenzene.
3. Further purification and purification gave the desired product.
Safety Information:
1-ethynyl-2-methylbenzene is a flammable liquid. Care should be taken to avoid exposure to open flames and high temperatures. During handling and storage, good ventilation measures should be taken, and inhalation or skin contact should be avoided. Wear appropriate protective equipment, such as gloves and goggles. The compound is irritating to the eyes and skin and may have potentially chronic toxic effects on humans. Therefore, the relevant safety instructions should be read carefully before operation to ensure safe use.
Nature:
1-ethynyl-2-methylbenzene is a colorless liquid with a fragrant odor. It has a density of about 0.869g/cm³, a boiling point of 144-145°C, and a melting point of -53°C. The molecular weight of this compound is 120.16g/mol.
Use:
1-ethynyl-2-methylbenzene has a wide range of applications in organic synthesis. It can be used as a reagent for the establishment of carbon-carbon bonds and for the synthesis of other organic compounds, such as drugs, dyes and pesticides. In addition, it can also be used as a solvent, an organic synthesis intermediate or a reactant.
Preparation Method:
1-ethynyl-2-methylbenzene can be prepared by the reaction of a benzyl halide with acetylene. Specific preparation methods include:
1. The benzyl halide reacts with triethylamine to generate sodium benzyl.
2. In the presence of ammonia, sodium benzyl reacts with acetylene to generate 1-ethynyl-2-methylbenzene.
3. Further purification and purification gave the desired product.
Safety Information:
1-ethynyl-2-methylbenzene is a flammable liquid. Care should be taken to avoid exposure to open flames and high temperatures. During handling and storage, good ventilation measures should be taken, and inhalation or skin contact should be avoided. Wear appropriate protective equipment, such as gloves and goggles. The compound is irritating to the eyes and skin and may have potentially chronic toxic effects on humans. Therefore, the relevant safety instructions should be read carefully before operation to ensure safe use.
Last Update：2024-04-09 20:52:54
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Raw Materials for Benzene, 1-ethynyl-2-methyl- (9CI)
Benzene, 1-(2,2-dibromoethenyl)-2-methyl-
2-TRIMETHYLSILYLETHYNYLTOLUENE
Iodomethane
Trimethylsilylacetylene
2-TRIMETHYLSILYLETHYNYLTOLUENE
Iodomethane
Trimethylsilylacetylene
Downstream Products for Benzene, 1-ethynyl-2-methyl- (9CI)