42390-68-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42390-68-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,3,9 and 0 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 42390-68:
(7*4)+(6*2)+(5*3)+(4*9)+(3*0)+(2*6)+(1*8)=111
111 % 10 = 1
So 42390-68-1 is a valid CAS Registry Number.