5257-99-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 5257-99-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,2,5 and 7 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 5257-99:
(6*5)+(5*2)+(4*5)+(3*7)+(2*9)+(1*9)=108
108 % 10 = 8
So 5257-99-8 is a valid CAS Registry Number.