197571-20-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 197571-20-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,7,5,7 and 1 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 197571-20:
(8*1)+(7*9)+(6*7)+(5*5)+(4*7)+(3*1)+(2*2)+(1*0)=173
173 % 10 = 3
So 197571-20-3 is a valid CAS Registry Number.