6399-91-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6399-91-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,3,9 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 6399-91:
(6*6)+(5*3)+(4*9)+(3*9)+(2*9)+(1*1)=133
133 % 10 = 3
So 6399-91-3 is a valid CAS Registry Number.