397-73-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 397-73-9 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 3,9 and 7 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 397-73:
(5*3)+(4*9)+(3*7)+(2*7)+(1*3)=89
89 % 10 = 9
So 397-73-9 is a valid CAS Registry Number.