547721-16-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 547721-16-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,4,7,7,2 and 1 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 547721-16:
(8*5)+(7*4)+(6*7)+(5*7)+(4*2)+(3*1)+(2*1)+(1*6)=164
164 % 10 = 4
So 547721-16-4 is a valid CAS Registry Number.