257280-84-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 257280-84-5 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 4 respectively.
Calculate Digit Verification of CAS Registry Number 257280-84:
(8*2)+(7*5)+(6*7)+(5*2)+(4*8)+(3*0)+(2*8)+(1*4)=155
155 % 10 = 5
So 257280-84-5 is a valid CAS Registry Number.