1866-80-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1866-80-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,8,6 and 6 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1866-80:
(6*1)+(5*8)+(4*6)+(3*6)+(2*8)+(1*0)=104
104 % 10 = 4
So 1866-80-4 is a valid CAS Registry Number.