280-89-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 280-89-7 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 2,8 and 0 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 280-89:
(5*2)+(4*8)+(3*0)+(2*8)+(1*9)=67
67 % 10 = 7
So 280-89-7 is a valid CAS Registry Number.