Spectrum Chemical manufactures and distributes fine chemicals with quality you can count on including those with CAS number 73-31-4, Whether you call it Melatonin, N-Acetyl-5-methoxytryptamine or N-[2-(5-Methoxyindol-3-yl)ethyl]acetamide you can be assured the Melatonin products offered by Spectrum, meet or exceed the grade requirements or specifications for each individual product.