169689-19-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 169689-19-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,9,6,8 and 9 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 169689-19:
(8*1)+(7*6)+(6*9)+(5*6)+(4*8)+(3*9)+(2*1)+(1*9)=204
204 % 10 = 4
So 169689-19-4 is a valid CAS Registry Number.