19980-20-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 19980-20-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,9,8 and 0 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 19980-20:
(7*1)+(6*9)+(5*9)+(4*8)+(3*0)+(2*2)+(1*0)=142
142 % 10 = 2
So 19980-20-2 is a valid CAS Registry Number.