204199-71-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 204199-71-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,4,1,9 and 9 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 204199-71:
(8*2)+(7*0)+(6*4)+(5*1)+(4*9)+(3*9)+(2*7)+(1*1)=123
123 % 10 = 3
So 204199-71-3 is a valid CAS Registry Number.