20191-03-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20191-03-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,1,9 and 1 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 20191-03:
(7*2)+(6*0)+(5*1)+(4*9)+(3*1)+(2*0)+(1*3)=61
61 % 10 = 1
So 20191-03-1 is a valid CAS Registry Number.