22656-99-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 22656-99-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,2,6,5 and 6 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 22656-99:
(7*2)+(6*2)+(5*6)+(4*5)+(3*6)+(2*9)+(1*9)=121
121 % 10 = 1
So 22656-99-1 is a valid CAS Registry Number.