16809-05-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 16809-05-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,8,0 and 9 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 16809-05:
(7*1)+(6*6)+(5*8)+(4*0)+(3*9)+(2*0)+(1*5)=115
115 % 10 = 5
So 16809-05-5 is a valid CAS Registry Number.