Haber's Law

Haber's Law makes equivalent any two groupings of dose concentration and exposure time that have equivalent mathematical products. For instance, if we assign dose concentration the symbol C, and time the classic t, then for any two dose schema, if C₁t₁=C₂t₂, then under Haber's Law the two dose schema are equivalent. It is important to note that Haber's Law is not true for all cases. If a substance is efficiently eliminated in the host, then Haber's Law breaks down in the limit of t approaching the order of the half-life of the drug, rewriting the equation as the integral ʃCdt = constant for arbitrary varying C and elapsed time T. The gaseous toxic industrial chemicals usually do not obey this law per the United States National Research Council reviews of toxicity experiments.

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See also LD50.