For product developers, food scientists, and chemists, understanding the precise properties of an ingredient is fundamental to its successful application. 2-Methoxy-3-methylpyrazine (CAS 68378-13-2) is a compound of significant interest in the flavor and fragrance industry due to its characteristic aroma profile. Delving into its chemical and physical properties, as well as its safety considerations, provides invaluable insight for anyone looking to procure and utilize this versatile molecule.

Chemical Structure and Identity:
2-Methoxy-3-methylpyrazine belongs to the pyrazine family, a group of nitrogen-containing heterocyclic aromatic compounds. Its molecular formula is C6H8N2O, and it has a molecular weight of approximately 124.14 g/mol. The compound is an isomer of other methoxy-methylpyrazines, and its specific arrangement of functional groups—a methoxy group (-OCH3) and a methyl group (-CH3) attached to the pyrazine ring—dictates its unique sensory attributes. Its IUPAC name is 2-methoxy-3-methylpyrazine, and it is widely recognized by its CAS registry number, 68378-13-2.

Physical Characteristics and Stability:
In its pure form, 2-Methoxy-3-methylpyrazine typically presents as a colorless to slightly yellow liquid. Key physical properties include a boiling point of approximately 159.3 °C at atmospheric pressure and a flash point of around 55.6 °C (TCC). This moderate flash point indicates it is a flammable liquid, requiring appropriate handling and storage. It exhibits solubility in water, alcohol, and ether, making it compatible with a wide range of solvents used in flavor and fragrance formulations. Stability is generally good under recommended storage conditions, typically in cool, dry, and tightly sealed containers, protected from heat and light.

Sensory Profile and Applications:
The defining characteristic of 2-Methoxy-3-methylpyrazine is its potent aroma, often described as hazelnut, almond, cocoa, roasted peanut, and sometimes even earthy or mushroom-like. This complex profile makes it highly sought after in the food industry to impart or enhance nutty and roasted notes in confectionery, baked goods, beverages, and savory products. Its low odor threshold means it is effective at very low concentrations, offering a cost-efficient way to achieve desired flavor impacts. When procuring this chemical, ensuring it meets high purity standards from a reliable manufacturer is essential for consistent sensory outcomes.

Safety and Handling Considerations:
While valuable, 2-Methoxy-3-methylpyrazine, like many chemicals, requires careful handling. It is classified as harmful if swallowed and can be irritating to the eyes, respiratory system, and skin. Appropriate personal protective equipment (PPE), including gloves, eye protection, and suitable clothing, should be worn when handling. Adequate ventilation is also crucial. For those considering purchasing this compound, understanding these safety parameters is as important as understanding its application potential. Always consult the Material Safety Data Sheet (MSDS) provided by the supplier for comprehensive safety information.