209456-19-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 209456-19-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,9,4,5 and 6 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 209456-19:
(8*2)+(7*0)+(6*9)+(5*4)+(4*5)+(3*6)+(2*1)+(1*9)=139
139 % 10 = 9
So 209456-19-9 is a valid CAS Registry Number.