1-benzyl-3,4,7,8,9,10-hexahydro-1H-benzo[4,5]thieno[2,3-d]pyrimido[1,2-a]pyrimidine-2,6-dione is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 66607-55-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,6,0 and 7 respectively; the second part has 2 digits, 5 and 5 respectively. Calculate Digit Verification of CAS Registry Number 66607-55: (7*6)+(6*6)+(5*6)+(4*0)+(3*7)+(2*5)+(1*5)=144 144 % 10 = 4 So 66607-55-4 is a valid CAS Registry Number.