20809-71-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20809-71-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,8,0 and 9 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 20809-71:
(7*2)+(6*0)+(5*8)+(4*0)+(3*9)+(2*7)+(1*1)=96
96 % 10 = 6
So 20809-71-6 is a valid CAS Registry Number.