257863-40-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 257863-40-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,7,8,6 and 3 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 257863-40:
(8*2)+(7*5)+(6*7)+(5*8)+(4*6)+(3*3)+(2*4)+(1*0)=174
174 % 10 = 4
So 257863-40-4 is a valid CAS Registry Number.