257907-05-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 257907-05-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,7,9,0 and 7 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 257907-05:
(8*2)+(7*5)+(6*7)+(5*9)+(4*0)+(3*7)+(2*0)+(1*5)=164
164 % 10 = 4
So 257907-05-4 is a valid CAS Registry Number.