Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 99-90-1, Whether you call it 4'-Bromoacetophenone, 1-(4-Bromophenyl)ethanone or 1-Acetyl-4-bromobenzene you can be assured the 4'-Bromoacetophenone products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.