11-23-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 11-23-4 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 1 and 1 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 11-23:
(4*1)+(3*1)+(2*2)+(1*3)=14
14 % 10 = 4
So 11-23-4 is a valid CAS Registry Number.