5,5'-Methylenebis(2H-benzotriazole)(CAS: 15805-10-4)

5,5'-Methylenebis(2H-benzotriazole) is a white crystalline solid with a molecular weight of approximately 286.26 g/mol. It has good solubility in organic solvents like ethanol and acetone but is poorly soluble in water. It exhibits moderate reactivity, particularly in UV light, making it effective as a UV absorber. The compound is stable under normal storage conditions but should be protected from moisture and heat.

5,5'-Methylenebis(2H-benzotriazole) is typically synthesized by the reaction of 2,2'-dihydroxybenzophenone with an azide followed by a reductive amination step. Commonly, sodium azide and an appropriate reductant like sodium borohydride are used. This method provides good yield and selectivity, making it a viable industrial synthesis route.

5,5'-Methylenebis(2H-benzotriazole) is widely used in the pharmaceutical, polymer, and semiconductor industries. It serves as a UV stabilizer in plastics and coatings, enhances the stability of pharmaceuticals, and can be used in the production of semiconductor materials where it helps protect against photodegradation.

When handling 5,5'-Methylenebis(2H-benzotriazole), it is important to wear personal protective equipment (PPE) such as gloves, goggles, and a lab coat. Work in a well-ventilated area or fume hood to avoid inhalation of the compound. Spills should be handled with caution; neutralize any acids or bases before cleaning up with water. Always refer to the Safety Data Sheet (SDS) for detailed information on handling and storage.