74684-57-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 74684-57-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,6,8 and 4 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 74684-57:
(7*7)+(6*4)+(5*6)+(4*8)+(3*4)+(2*5)+(1*7)=164
164 % 10 = 4
So 74684-57-4 is a valid CAS Registry Number.