42556-43-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42556-43-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,5,5 and 6 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 42556-43:
(7*4)+(6*2)+(5*5)+(4*5)+(3*6)+(2*4)+(1*3)=114
114 % 10 = 4
So 42556-43-4 is a valid CAS Registry Number.