71516-57-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 71516-57-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,5,1 and 6 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 71516-57:
(7*7)+(6*1)+(5*5)+(4*1)+(3*6)+(2*5)+(1*7)=119
119 % 10 = 9
So 71516-57-9 is a valid CAS Registry Number.