3309-49-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 3309-49-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,3,0 and 9 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 3309-49:
(6*3)+(5*3)+(4*0)+(3*9)+(2*4)+(1*9)=77
77 % 10 = 7
So 3309-49-7 is a valid CAS Registry Number.