2457-91-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2457-91-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,4,5 and 7 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 2457-91:
(6*2)+(5*4)+(4*5)+(3*7)+(2*9)+(1*1)=92
92 % 10 = 2
So 2457-91-2 is a valid CAS Registry Number.