721920-47-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 721920-47-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,2,1,9,2 and 0 respectively; the second part has 2 digits, 4 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 721920-47:
(8*7)+(7*2)+(6*1)+(5*9)+(4*2)+(3*0)+(2*4)+(1*7)=144
144 % 10 = 4
So 721920-47-4 is a valid CAS Registry Number.