Hydroxyacetone

Hydroxyacetone (CAS 116-09-6): A Comprehensive Product Introduction

Hydroxyacetone, with the CAS number 116-09-6, is a significant organic compound that has attracted considerable attention in various industries. This article aims to provide a detailed overview of Hydroxyacetone, including its properties, uses, applications in different fields, and preparation methods.

Product Overview

Hydroxyacetone, also known as acetol, is a colorless to pale – yellow liquid. It has a molecular formula of C₃H₆O₂ and a molecular weight of approximately 74.08 g/mol. This compound contains both a hydroxyl group (-OH) and a ketone group (C = O), which endows it with unique chemical reactivity and physical properties.

Physical and Chemical Properties

Physical Properties: Hydroxyacetone has a boiling point of around 145 – 146 °C and a melting point of -17 °C. It is miscible with water, ethanol, and ether, indicating its good solubility in polar solvents. The density of Hydroxyacetone is about 1.082 g/cm³ at 20 °C.

Chemical Properties: Due to the presence of the hydroxyl and ketone groups, Hydroxyacetone can participate in a variety of chemical reactions. It can undergo oxidation reactions to form more oxidized products such as pyruvic acid. It can also react with reducing agents to form corresponding alcohols. Additionally, it can participate in condensation reactions with aldehydes or other carbonyl – containing compounds.

Uses and Applications

Pharmaceutical Industry: Hydroxyacetone serves as an important intermediate in the synthesis of various pharmaceutical compounds. For example, it can be used in the synthesis of chiral drugs. The hydroxyl and ketone groups in Hydroxyacetone can be selectively modified to introduce different functional groups, which is crucial for the construction of complex drug molecules. Some anti – inflammatory and anti – tumor drugs may involve Hydroxyacetone in their synthetic routes.

Food Industry: In the food industry, Hydroxyacetone is used as a flavoring agent. It has a sweet, caramel – like odor, which can enhance the flavor of food products. It is often used in the production of baked goods, candies, and beverages to impart a rich and pleasant taste.

Cosmetic Industry: Hydroxyacetone is a key ingredient in self – tanning products. When applied to the skin, it reacts with the amino acids in the stratum corneum to form a brownish – colored compound, mimicking the effect of a natural tan. This provides a safe alternative to sun exposure for achieving a tanned appearance.

Chemical Industry: It is used as a solvent in some chemical processes. Its ability to dissolve a wide range of organic compounds makes it suitable for applications such as paint stripping, resin dissolution, and in the formulation of certain adhesives. Moreover, Hydroxyacetone can be used as a building block for the synthesis of polymers and other high – value chemicals.

Preparation Methods

Oxidation of Propylene Glycol: One of the common methods for preparing Hydroxyacetone is the oxidation of propylene glycol. This reaction can be carried out using various oxidizing agents such as hydrogen peroxide, nitric acid, or metal – based catalysts. For example, in the presence of a suitable metal catalyst like copper or silver, propylene glycol can be selectively oxidized to Hydroxyacetone under controlled reaction conditions.

Hydrolysis of 1,2 – Epoxy – 2 – propanol: 1,2 – Epoxy – 2 – propanol can be hydrolyzed to form Hydroxyacetone. This reaction usually occurs in an acidic or basic medium. Under acidic conditions, the epoxy ring opens, followed by rearrangement and hydrolysis to yield Hydroxyacetone.