23161-19-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 23161-19-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,1,6 and 1 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 23161-19:
(7*2)+(6*3)+(5*1)+(4*6)+(3*1)+(2*1)+(1*9)=75
75 % 10 = 5
So 23161-19-5 is a valid CAS Registry Number.