8031-20-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 8031-20-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 8,0,3 and 1 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 8031-20:
(6*8)+(5*0)+(4*3)+(3*1)+(2*2)+(1*0)=67
67 % 10 = 7
So 8031-20-7 is a valid CAS Registry Number.