6728-90-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6728-90-1 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 8 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 6728-90:
(6*6)+(5*7)+(4*2)+(3*8)+(2*9)+(1*0)=121
121 % 10 = 1
So 6728-90-1 is a valid CAS Registry Number.