22731-61-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 22731-61-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,2,7,3 and 1 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 22731-61:
(7*2)+(6*2)+(5*7)+(4*3)+(3*1)+(2*6)+(1*1)=89
89 % 10 = 9
So 22731-61-9 is a valid CAS Registry Number.