Borun New Material - ChemBorun offers a large range of 5-Ammonium valeric acid additives enabling researchers to tailor perovskite-based solar cells to various specifications. With a purity level > 99%, Borun New Material - ChemBorun's 5-Ammonium valeric acid chloride (5-AVAC; CAS Number: 627-95-2) exhibits a superior quality for reproducible results and premium performance.