Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 97-67-6, Whether you call it L-(�)-Malic Acid, (S)-Hydroxybutanedioic Acid or L-Hydroxysuccinic Acid you can be assured the L-(�)-Malic Acid products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.