680-23-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 680-23-9 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 0 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 680-23:
(5*6)+(4*8)+(3*0)+(2*2)+(1*3)=69
69 % 10 = 9
So 680-23-9 is a valid CAS Registry Number.