57540-43-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 57540-43-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,5,4 and 0 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 57540-43:
(7*5)+(6*7)+(5*5)+(4*4)+(3*0)+(2*4)+(1*3)=129
129 % 10 = 9
So 57540-43-9 is a valid CAS Registry Number.