6689-89-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 6689-89-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,6,8 and 9 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 6689-89:
(6*6)+(5*6)+(4*8)+(3*9)+(2*8)+(1*9)=150
150 % 10 = 0
So 6689-89-0 is a valid CAS Registry Number.