L-Tyrosine biochemical product blog Tags: Biochemical; L-Tyrosine; L-Tyrosine biochemical; Posted by mybiosource_staff on . The L-Tyrosine n/a (Catalog #MBS545278) 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:L-TYROSINEGrade: USP GradeCAS Number: [60-18-4]Heavy Metals: <=10ppm.