7728-76-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7728-76-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,7,2 and 8 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 7728-76:
(6*7)+(5*7)+(4*2)+(3*8)+(2*7)+(1*6)=129
129 % 10 = 9
So 7728-76-9 is a valid CAS Registry Number.