Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 87-51-4, Whether you call it Indole-3-acetic Acid, 2-(1H-Indol-3-yl)acetic Acid or Heteroauxin you can be assured the Indole-3-acetic Acid products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.