22691-90-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 22691-90-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,2,6,9 and 1 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 22691-90:
(7*2)+(6*2)+(5*6)+(4*9)+(3*1)+(2*9)+(1*0)=113
113 % 10 = 3
So 22691-90-3 is a valid CAS Registry Number.