7133-17-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7133-17-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,1,3 and 3 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 7133-17:
(6*7)+(5*1)+(4*3)+(3*3)+(2*1)+(1*7)=77
77 % 10 = 7
So 7133-17-7 is a valid CAS Registry Number.