66728-54-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 66728-54-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,7,2 and 8 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 66728-54:
(7*6)+(6*6)+(5*7)+(4*2)+(3*8)+(2*5)+(1*4)=159
159 % 10 = 9
So 66728-54-9 is a valid CAS Registry Number.