ethyl 1,3,8-trimethyl-2,4,7-trioxo-1,2,3,4,7,8-hexahydro-6-pteridinecarboxylate is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 91769-67-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,7,6 and 9 respectively; the second part has 2 digits, 6 and 7 respectively. Calculate Digit Verification of CAS Registry Number 91769-67: (7*9)+(6*1)+(5*7)+(4*6)+(3*9)+(2*6)+(1*7)=174 174 % 10 = 4 So 91769-67-4 is a valid CAS Registry Number.