20172-68-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20172-68-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,1,7 and 2 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 20172-68:
(7*2)+(6*0)+(5*1)+(4*7)+(3*2)+(2*6)+(1*8)=73
73 % 10 = 3
So 20172-68-3 is a valid CAS Registry Number.