42945-81-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42945-81-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,9,4 and 5 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 42945-81:
(7*4)+(6*2)+(5*9)+(4*4)+(3*5)+(2*8)+(1*1)=133
133 % 10 = 3
So 42945-81-3 is a valid CAS Registry Number.