257289-81-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 257289-81-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,7,2,8 and 9 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 257289-81:
(8*2)+(7*5)+(6*7)+(5*2)+(4*8)+(3*9)+(2*8)+(1*1)=179
179 % 10 = 9
So 257289-81-9 is a valid CAS Registry Number.