21423-55-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21423-55-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,4,2 and 3 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 21423-55:
(7*2)+(6*1)+(5*4)+(4*2)+(3*3)+(2*5)+(1*5)=72
72 % 10 = 2
So 21423-55-2 is a valid CAS Registry Number.