259109-99-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 259109-99-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,9,1,0 and 9 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 259109-99:
(8*2)+(7*5)+(6*9)+(5*1)+(4*0)+(3*9)+(2*9)+(1*9)=164
164 % 10 = 4
So 259109-99-4 is a valid CAS Registry Number.