91690-59-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 91690-59-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,6,9 and 0 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 91690-59:
(7*9)+(6*1)+(5*6)+(4*9)+(3*0)+(2*5)+(1*9)=154
154 % 10 = 4
So 91690-59-4 is a valid CAS Registry Number.