91558-68-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 91558-68-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,5,5 and 8 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 91558-68:
(7*9)+(6*1)+(5*5)+(4*5)+(3*8)+(2*6)+(1*8)=158
158 % 10 = 8
So 91558-68-8 is a valid CAS Registry Number.