257891-49-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 257891-49-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,7,8,9 and 1 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 257891-49:
(8*2)+(7*5)+(6*7)+(5*8)+(4*9)+(3*1)+(2*4)+(1*9)=189
189 % 10 = 9
So 257891-49-9 is a valid CAS Registry Number.