42549-97-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42549-97-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,5,4 and 9 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 42549-97:
(7*4)+(6*2)+(5*5)+(4*4)+(3*9)+(2*9)+(1*7)=133
133 % 10 = 3
So 42549-97-3 is a valid CAS Registry Number.