56581-45-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 56581-45-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,6,5,8 and 1 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 56581-45:
(7*5)+(6*6)+(5*5)+(4*8)+(3*1)+(2*4)+(1*5)=144
144 % 10 = 4
So 56581-45-4 is a valid CAS Registry Number.