42523-31-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42523-31-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,5,2 and 3 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 42523-31:
(7*4)+(6*2)+(5*5)+(4*2)+(3*3)+(2*3)+(1*1)=89
89 % 10 = 9
So 42523-31-9 is a valid CAS Registry Number.