22117-87-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 22117-87-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,2,1,1 and 7 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 22117-87:
(7*2)+(6*2)+(5*1)+(4*1)+(3*7)+(2*8)+(1*7)=79
79 % 10 = 9
So 22117-87-9 is a valid CAS Registry Number.