205109-12-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 205109-12-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,5,1,0 and 9 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 205109-12:
(8*2)+(7*0)+(6*5)+(5*1)+(4*0)+(3*9)+(2*1)+(1*2)=82
82 % 10 = 2
So 205109-12-2 is a valid CAS Registry Number.