3305-80-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 3305-80-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,3,0 and 5 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 3305-80:
(6*3)+(5*3)+(4*0)+(3*5)+(2*8)+(1*0)=64
64 % 10 = 4
So 3305-80-4 is a valid CAS Registry Number.