56-56-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 56-56-4 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 5 and 6 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 56-56:
(4*5)+(3*6)+(2*5)+(1*6)=54
54 % 10 = 4
So 56-56-4 is a valid CAS Registry Number.