54157-57-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 54157-57-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,4,1,5 and 7 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 54157-57:
(7*5)+(6*4)+(5*1)+(4*5)+(3*7)+(2*5)+(1*7)=122
122 % 10 = 2
So 54157-57-2 is a valid CAS Registry Number.