66539-23-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 66539-23-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,5,3 and 9 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 66539-23:
(7*6)+(6*6)+(5*5)+(4*3)+(3*9)+(2*2)+(1*3)=149
149 % 10 = 9
So 66539-23-9 is a valid CAS Registry Number.