Overview
2-Acetyl-5-methylthiophene is an organic compound belonging to the thiophene family, characterized by an acetyl group at the 2-position and a methyl group at the 5-position of the thiophene ring. It is commonly used as a flavoring agent due to its nutty, roasted aroma and as an intermediate in the synthesis of pharmaceuticals and agrochemicals. The compound is typically synthesized through Friedel-Crafts acylation of 2-methylthiophene. Its unique structure makes it valuable in the production of complex organic molecules, particularly in the fragrance and flavor industry.
Physical and Chemical Properties
2-Acetyl-5-methylthiophene is a colorless to pale yellow liquid with a density of approximately 1.12 g/cm³. It has a boiling point range of 220-222°C and is soluble in common organic solvents such as ethanol and ether. The compound exhibits typical thiophene reactivity, including electrophilic substitution reactions. Its acetyl group makes it a versatile intermediate for further chemical modifications. The compound is stable under normal storage conditions but should be protected from prolonged exposure to light and oxidizing agents to prevent degradation.
Main Applications
The primary use of 2-acetyl-5-methylthiophene is as a flavoring agent in the food industry, where it imparts a roasted, nutty flavor to products such as coffee, chocolate, and meat substitutes. It is also used in the fragrance industry to create complex aroma profiles. In organic synthesis, the compound serves as a building block for pharmaceuticals and agrochemicals. Its reactivity allows for the creation of derivatives with potential biological activity, making it valuable in drug discovery and development processes.
Safety and Storage
2-Acetyl-5-methylthiophene should be handled with appropriate personal protective equipment, including gloves and eye protection. Inhalation or ingestion should be avoided, and adequate ventilation should be maintained in working areas. The compound should be stored in a cool, dry place away from direct sunlight and oxidizing agents. Containers should be tightly sealed to prevent evaporation and contamination. In case of spillage, absorb with inert material and dispose of according to local regulations.
B2B Procurement Guide
When procuring 2-acetyl-5-methylthiophene, buyers should clearly specify the required purity level, which typically ranges from 95% to 99% depending on the application. Technical grade is suitable for industrial uses, while higher purity is needed for pharmaceutical applications. Consider ordering from suppliers with proper certification and quality control processes. Bulk purchases may offer cost advantages, but storage capacity and shelf life should be considered. Request material safety data sheets (MSDS) and certificates of analysis (CoA) with each shipment.
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