22222-99-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 22222-99-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,2,2,2 and 2 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 22222-99:
(7*2)+(6*2)+(5*2)+(4*2)+(3*2)+(2*9)+(1*9)=77
77 % 10 = 7
So 22222-99-7 is a valid CAS Registry Number.