669-99-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 669-99-8 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 6,6 and 9 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 669-99:
(5*6)+(4*6)+(3*9)+(2*9)+(1*9)=108
108 % 10 = 8
So 669-99-8 is a valid CAS Registry Number.