42408-21-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42408-21-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,4,0 and 8 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 42408-21:
(7*4)+(6*2)+(5*4)+(4*0)+(3*8)+(2*2)+(1*1)=89
89 % 10 = 9
So 42408-21-9 is a valid CAS Registry Number.