204258-65-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 204258-65-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,4,2,5 and 8 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 204258-65:
(8*2)+(7*0)+(6*4)+(5*2)+(4*5)+(3*8)+(2*6)+(1*5)=111
111 % 10 = 1
So 204258-65-1 is a valid CAS Registry Number.