3-(7-Methyl-2,4,6,8-tetraoxo-1,3,4,6,7,8-hexahydro-2H-pyrimido[5,4-g]pteridin-10-yl)-benzoic acid is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 87750-80-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,7,5 and 0 respectively; the second part has 2 digits, 8 and 0 respectively. Calculate Digit Verification of CAS Registry Number 87750-80: (7*8)+(6*7)+(5*7)+(4*5)+(3*0)+(2*8)+(1*0)=169 169 % 10 = 9 So 87750-80-9 is a valid CAS Registry Number.