6997-66-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6997-66-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,9,9 and 7 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 6997-66:
(6*6)+(5*9)+(4*9)+(3*7)+(2*6)+(1*6)=156
156 % 10 = 6
So 6997-66-6 is a valid CAS Registry Number.