1165-99-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1165-99-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,1,6 and 5 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1165-99:
(6*1)+(5*1)+(4*6)+(3*5)+(2*9)+(1*9)=77
77 % 10 = 7
So 1165-99-7 is a valid CAS Registry Number.