Table 2: Rounding analysis summary statistics for the chemical universe considered.

RfD_{o} 
RfC_{i} 
Number of chemicals with a rounded toxicity factor 
124 (50.6% of universe) 
40 (87% of universe) 
% of ‘rounded up’ toxicity factors 
58.1 
55.0 
% of ‘rounded down’ toxicity factors 
41.9 
45.0 


Magnitude range of ‘rounded up’ toxicity factors 
0.55%  33.3% 
2.04%  25.0% 
Arithmetic mean of the degree of toxicity factor rounding (absolute values considered) 
13.3% 
12.1% 


Magnitude range of ‘rounded down’ toxicity factors 
3.61%  30.07% 
3.03%  31.03% 
Arithmetic mean of the degree of toxicity factor rounding (absolute values considered) 
11.4% 
11.7% 