404-57-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 404-57-9 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 4,0 and 4 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 404-57:
(5*4)+(4*0)+(3*4)+(2*5)+(1*7)=49
49 % 10 = 9
So 404-57-9 is a valid CAS Registry Number.