4050-05-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 4050-05-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,0,5 and 0 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 4050-05:
(6*4)+(5*0)+(4*5)+(3*0)+(2*0)+(1*5)=49
49 % 10 = 9
So 4050-05-9 is a valid CAS Registry Number.