98904-80-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 98904-80-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,8,9,0 and 4 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 98904-80:
(7*9)+(6*8)+(5*9)+(4*0)+(3*4)+(2*8)+(1*0)=184
184 % 10 = 4
So 98904-80-4 is a valid CAS Registry Number.