79720-57-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 79720-57-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,9,7,2 and 0 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 79720-57:
(7*7)+(6*9)+(5*7)+(4*2)+(3*0)+(2*5)+(1*7)=163
163 % 10 = 3
So 79720-57-3 is a valid CAS Registry Number.