817172-52-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 817172-52-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,1,7,1,7 and 2 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 817172-52:
(8*8)+(7*1)+(6*7)+(5*1)+(4*7)+(3*2)+(2*5)+(1*2)=164
164 % 10 = 4
So 817172-52-4 is a valid CAS Registry Number.