817177-65-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 817177-65-4 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 7 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 817177-65:
(8*8)+(7*1)+(6*7)+(5*1)+(4*7)+(3*7)+(2*6)+(1*5)=184
184 % 10 = 4
So 817177-65-4 is a valid CAS Registry Number.