74222-28-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 74222-28-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,2,2 and 2 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 74222-28:
(7*7)+(6*4)+(5*2)+(4*2)+(3*2)+(2*2)+(1*8)=109
109 % 10 = 9
So 74222-28-9 is a valid CAS Registry Number.