42728-73-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42728-73-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,7,2 and 8 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 42728-73:
(7*4)+(6*2)+(5*7)+(4*2)+(3*8)+(2*7)+(1*3)=124
124 % 10 = 4
So 42728-73-4 is a valid CAS Registry Number.