1680-18-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1680-18-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,6,8 and 0 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1680-18:
(6*1)+(5*6)+(4*8)+(3*0)+(2*1)+(1*8)=78
78 % 10 = 8
So 1680-18-8 is a valid CAS Registry Number.