66609-68-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 66609-68-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,6,0 and 9 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 66609-68:
(7*6)+(6*6)+(5*6)+(4*0)+(3*9)+(2*6)+(1*8)=155
155 % 10 = 5
So 66609-68-5 is a valid CAS Registry Number.