166331-73-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 166331-73-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,6,3,3 and 1 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 166331-73:
(8*1)+(7*6)+(6*6)+(5*3)+(4*3)+(3*1)+(2*7)+(1*3)=133
133 % 10 = 3
So 166331-73-3 is a valid CAS Registry Number.