20204-11-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20204-11-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,2,0 and 4 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 20204-11:
(7*2)+(6*0)+(5*2)+(4*0)+(3*4)+(2*1)+(1*1)=39
39 % 10 = 9
So 20204-11-9 is a valid CAS Registry Number.