Understanding the intrinsic properties of a chemical compound is fundamental for its effective application, especially in sensitive industries like food flavoring and fragrance creation. 3-Mercapto-2-butanone (CAS 40789-98-8) is a prime example, whose unique chemical structure dictates its powerful sensory profile and reactivity. For R&D scientists and product formulators, a thorough grasp of these properties is essential when considering to buy this ingredient from a reliable manufacturer.

Chemical Structure and Molecular Characteristics

With the molecular formula C4H8OS and a molecular weight of 104.17 g/mol, 3-Mercapto-2-butanone features a carbonyl group (ketone) and a thiol group (-SH) attached to a four-carbon chain. This combination is key to its characteristic aroma and chemical behavior. The thiol group, in particular, is responsible for the potent sulfurous notes, often described as onion-like, leek-like, or even meaty, which are highly valued in flavor chemistry.

Sensory Profile: The Aroma Powerhouse

The most distinctive feature of 3-Mercapto-2-butanone is its intense aroma. Even at very low concentrations, it can significantly influence the olfactory and gustatory profiles of a product. This makes it an invaluable tool for flavorists who use it to:

  • Recreate authentic savory flavors (e.g., roasted meats, onions, garlic).
  • Add complexity and depth to food products like soups, sauces, and snacks.
  • Contribute specific notes in fragrance formulations.

Its high volatility ensures that the aroma is readily released, providing an immediate sensory impact. When you purchase this compound, you are acquiring a potent aroma agent that requires careful handling and precise dosing.

Physical and Chemical Properties for Application

As a colorless to light yellow liquid, 3-Mercapto-2-butanone is easily incorporated into liquid formulations. Key physical properties include:

  • Boiling Point: Approximately 48-49 °C at 15 mmHg, indicating its volatility.
  • Density: Around 1.035 g/mL at 25 °C.
  • Solubility: Slightly soluble in water, but readily soluble in organic solvents like ethanol and ether, as well as alkaline solutions.

Chemically, the thiol group makes it reactive, enabling it to participate in various organic synthesis reactions. This reactivity is leveraged when using it as an intermediate for producing pharmaceuticals, agrochemicals, and other fine chemicals. For applications requiring this specific reactivity, sourcing high-purity material from a trusted supplier is critical.

Safety and Handling Considerations

Due to its strong odor and potential irritant properties, proper handling is essential. Storing it in a cool, dry, and well-ventilated place, away from light and heat, is recommended. When looking to buy, ensure your manufacturer provides comprehensive safety data sheets (SDS). We, as a leading supplier, are committed to providing products that meet stringent quality and safety standards, ensuring you can use 3-Mercapto-2-butanone effectively and safely in your applications.