23404-40-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 23404-40-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,4,0 and 4 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 23404-40:
(7*2)+(6*3)+(5*4)+(4*0)+(3*4)+(2*4)+(1*0)=72
72 % 10 = 2
So 23404-40-2 is a valid CAS Registry Number.