689-68-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 689-68-9 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 6,8 and 9 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 689-68:
(5*6)+(4*8)+(3*9)+(2*6)+(1*8)=109
109 % 10 = 9
So 689-68-9 is a valid CAS Registry Number.