257280-83-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 257280-83-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,7,2,8 and 0 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 257280-83:
(8*2)+(7*5)+(6*7)+(5*2)+(4*8)+(3*0)+(2*8)+(1*3)=154
154 % 10 = 4
So 257280-83-4 is a valid CAS Registry Number.