91021-13-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 91021-13-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,0,2 and 1 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 91021-13:
(7*9)+(6*1)+(5*0)+(4*2)+(3*1)+(2*1)+(1*3)=85
85 % 10 = 5
So 91021-13-5 is a valid CAS Registry Number.