21023-32-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21023-32-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,0,2 and 3 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 21023-32:
(7*2)+(6*1)+(5*0)+(4*2)+(3*3)+(2*3)+(1*2)=45
45 % 10 = 5
So 21023-32-5 is a valid CAS Registry Number.