172305-20-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 172305-20-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,2,3,0 and 5 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 172305-20:
(8*1)+(7*7)+(6*2)+(5*3)+(4*0)+(3*5)+(2*2)+(1*0)=103
103 % 10 = 3
So 172305-20-3 is a valid CAS Registry Number.