817173-34-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 817173-34-5 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 3 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 817173-34:
(8*8)+(7*1)+(6*7)+(5*1)+(4*7)+(3*3)+(2*3)+(1*4)=165
165 % 10 = 5
So 817173-34-5 is a valid CAS Registry Number.