556-28-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 556-28-5 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 5,5 and 6 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 556-28:
(5*5)+(4*5)+(3*6)+(2*2)+(1*8)=75
75 % 10 = 5
So 556-28-5 is a valid CAS Registry Number.