Thymine biochemical product blog Tags: Biochemical; Thymine; Thymine biochemical; Posted by mybiosource_staff on . The Thymine n/a (Catalog #MBS545818) is a Biochemical and is intended for research purposes only. The product is available for immediate purchase.To buy or view more detailed product information and pricing, please click on the technical datasheet page below:ThymineGrade: ReagentCAS Number: [65-71-4]Heavy Metals: <10 ppm.