22581-97-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 22581-97-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,2,5,8 and 1 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 22581-97:
(7*2)+(6*2)+(5*5)+(4*8)+(3*1)+(2*9)+(1*7)=111
111 % 10 = 1
So 22581-97-1 is a valid CAS Registry Number.