22191-54-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 22191-54-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,2,1,9 and 1 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 22191-54:
(7*2)+(6*2)+(5*1)+(4*9)+(3*1)+(2*5)+(1*4)=84
84 % 10 = 4
So 22191-54-4 is a valid CAS Registry Number.