66817-02-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 66817-02-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,8,1 and 7 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 66817-02:
(7*6)+(6*6)+(5*8)+(4*1)+(3*7)+(2*0)+(1*2)=145
145 % 10 = 5
So 66817-02-5 is a valid CAS Registry Number.