18721-64-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 18721-64-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,7,2 and 1 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 18721-64:
(7*1)+(6*8)+(5*7)+(4*2)+(3*1)+(2*6)+(1*4)=117
117 % 10 = 7
So 18721-64-7 is a valid CAS Registry Number.