43091-20-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 43091-20-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,3,0,9 and 1 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 43091-20:
(7*4)+(6*3)+(5*0)+(4*9)+(3*1)+(2*2)+(1*0)=89
89 % 10 = 9
So 43091-20-9 is a valid CAS Registry Number.