198203-80-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 198203-80-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,8,2,0 and 3 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 198203-80:
(8*1)+(7*9)+(6*8)+(5*2)+(4*0)+(3*3)+(2*8)+(1*0)=154
154 % 10 = 4
So 198203-80-4 is a valid CAS Registry Number.