6721-96-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6721-96-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,7,2 and 1 respectively; the second part has 2 digits, 9 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 6721-96:
(6*6)+(5*7)+(4*2)+(3*1)+(2*9)+(1*6)=106
106 % 10 = 6
So 6721-96-6 is a valid CAS Registry Number.