42031-80-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42031-80-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,0,3 and 1 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 42031-80:
(7*4)+(6*2)+(5*0)+(4*3)+(3*1)+(2*8)+(1*0)=71
71 % 10 = 1
So 42031-80-1 is a valid CAS Registry Number.