16689-52-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 16689-52-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,6,8 and 9 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 16689-52:
(7*1)+(6*6)+(5*6)+(4*8)+(3*9)+(2*5)+(1*2)=144
144 % 10 = 4
So 16689-52-4 is a valid CAS Registry Number.