15420-23-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 15420-23-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,5,4,2 and 0 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 15420-23:
(7*1)+(6*5)+(5*4)+(4*2)+(3*0)+(2*2)+(1*3)=72
72 % 10 = 2
So 15420-23-2 is a valid CAS Registry Number.