Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 89-57-6, Whether you call it 5-Aminosalicylic Acid, Mesalamine , 2-Hydroxy-5-aminobenzoic Acid or m-Aminosalicylic Acid you can be assured the 5-Aminosalicylic Acid products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.