21228-53-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21228-53-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,2,2 and 8 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 21228-53:
(7*2)+(6*1)+(5*2)+(4*2)+(3*8)+(2*5)+(1*3)=75
75 % 10 = 5
So 21228-53-5 is a valid CAS Registry Number.