42997-45-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 42997-45-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,9,9 and 7 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 42997-45:
(7*4)+(6*2)+(5*9)+(4*9)+(3*7)+(2*4)+(1*5)=155
155 % 10 = 5
So 42997-45-5 is a valid CAS Registry Number.