Overview
3-Hydroxy-2-butanone, commonly known as acetoin, is an organic compound with a sweet, buttery aroma. It is a natural byproduct of fermentation and is found in products like butter, yogurt, and wine. Industrially, it is synthesized for use as a flavoring agent in food and beverages, as well as in perfumery and pharmaceuticals. Acetoin is classified as a ketone alcohol and is often used in combination with diacetyl to enhance buttery flavors. Its versatility and natural occurrence make it a popular choice in the food industry, particularly in dairy and baked goods.
Physical and Chemical Properties
3-Hydroxy-2-butanone is a colorless to pale yellow liquid with a density of 1.016 g/cm³. It has a melting point of 15 °C and a boiling point of 148 °C. The compound is soluble in water, ethanol, and ether, making it easy to incorporate into various formulations. Its key chemical property is its ability to contribute a buttery flavor, which is why it is widely used in food applications. The compound is stable under normal conditions but should be stored away from heat and open flames to prevent decomposition.
Main Applications
The primary use of 3-hydroxy-2-butanone is as a flavoring agent in the food and beverage industry. It is commonly added to dairy products, baked goods, and confectionery to impart a buttery taste. In perfumery, it is used to create creamy and sweet fragrances. In the pharmaceutical industry, acetoin serves as an intermediate in the synthesis of other compounds. Its natural occurrence and mild toxicity profile make it suitable for use in a wide range of consumer products.
Safety and Storage
While 3-hydroxy-2-butanone is generally considered safe for use in food, it can cause skin and eye irritation upon direct contact. Proper personal protective equipment, such as gloves and goggles, should be worn when handling the compound. Storage should be in a cool, dry, well-ventilated area away from heat sources and open flames. The compound is stable under normal conditions but should be kept in tightly sealed containers to prevent contamination and evaporation.
B2B Procurement Guide
When procuring 3-hydroxy-2-butanone, B2B buyers should verify the CAS number (513-86-0) to ensure product authenticity. Purity is a critical factor, especially for food-grade applications, so supplier certifications should be thoroughly checked. Prices typically range from $20 to $50 per kg, depending on purity and order volume. Buyers should also consider logistical factors, such as storage conditions and transportation requirements, to ensure the product arrives in optimal condition.
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