4023-71-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 4023-71-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,0,2 and 3 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 4023-71:
(6*4)+(5*0)+(4*2)+(3*3)+(2*7)+(1*1)=56
56 % 10 = 6
So 4023-71-6 is a valid CAS Registry Number.