20304-71-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20304-71-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,3,0 and 4 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 20304-71:
(7*2)+(6*0)+(5*3)+(4*0)+(3*4)+(2*7)+(1*1)=56
56 % 10 = 6
So 20304-71-6 is a valid CAS Registry Number.