20723-71-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20723-71-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,7,2 and 3 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 20723-71:
(7*2)+(6*0)+(5*7)+(4*2)+(3*3)+(2*7)+(1*1)=81
81 % 10 = 1
So 20723-71-1 is a valid CAS Registry Number.