71653-13-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 71653-13-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,1,6,5 and 3 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 71653-13:
(7*7)+(6*1)+(5*6)+(4*5)+(3*3)+(2*1)+(1*3)=119
119 % 10 = 9
So 71653-13-9 is a valid CAS Registry Number.