423-15-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 423-15-4 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 4,2 and 3 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 423-15:
(5*4)+(4*2)+(3*3)+(2*1)+(1*5)=44
44 % 10 = 4
So 423-15-4 is a valid CAS Registry Number.