165403-02-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 165403-02-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,5,4,0 and 3 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 165403-02:
(8*1)+(7*6)+(6*5)+(5*4)+(4*0)+(3*3)+(2*0)+(1*2)=111
111 % 10 = 1
So 165403-02-1 is a valid CAS Registry Number.