17222-20-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 17222-20-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,7,2,2 and 2 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 17222-20:
(7*1)+(6*7)+(5*2)+(4*2)+(3*2)+(2*2)+(1*0)=77
77 % 10 = 7
So 17222-20-7 is a valid CAS Registry Number.