20039-20-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20039-20-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,0,3 and 9 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 20039-20:
(7*2)+(6*0)+(5*0)+(4*3)+(3*9)+(2*2)+(1*0)=57
57 % 10 = 7
So 20039-20-7 is a valid CAS Registry Number.