Urea biochemical product blog Tags: Biochemical; Urea; Urea biochemical; Posted by mybiosource_staff on . The Urea n/a (Catalog #MBS545678) 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:UREAGrade: Ultra Pure (Conforms to ACS Grade)CAS Number: [57-13-6]Heavy Metals: <=0.001%.