Adapalene Impurity 1(CAS: 104224-63-7)

Adapalene Impurity 1 is a yellow to orange crystalline solid with a molecular weight of approximately 273.36 g/mol. It has a melting point of about 76-80°C and is poorly soluble in water but soluble in organic solvents like ethanol and acetone. It is reactive towards strong acids and bases, and forms stable complexes with transition metals.

Adapalene Impurity 1 is typically synthesized through a multistep process involving the condensation of 2-hydroxy-4-methylbenzophenone with 2-(3-indolyl)acetic acid, followed by oxidation and rearrangement. Commonly used catalysts include palladium-based complexes, and the process yields a pure impurity with good selectivity and high yield.

Adapalene Impurity 1 is primarily used in the pharmaceutical industry for quality control and impurity profiling of retinoids. It is also found in cosmetics, where it is used as a reference standard for the evaluation of retinoid products.

When handling Adapalene Impurity 1, it is essential to wear appropriate personal protective equipment (PPE) such as gloves, goggles, and a lab coat. Work should be conducted in a well-ventilated area or a fume hood. Spills should be cleaned up using appropriate absorbents, and the area should be thoroughly decontaminated. Always refer to the safety data sheet (SDS) for detailed handling and safety information.