Question

Explain these environmental tox data talking about each value in relative to broadleaf herbecide.

Environmental tox data LogPow 1.3 ts (Sterile soil] 4.7 h tx [Soil] = 1.6 h ty, [uv, 245 nm] - 25.6 h ty, [uv, 340 nm] 52.6 h ECso [Daphnia] 150 mg/L ECso [Trout] = 53 mg/L ECso [Chlorella] = 0.02 mg/L NOAEL [Quail-endpoint-SGPT] = 20 mg/kg body weight Human-related tox data ty [rat, oral) 3.5 h Carcinogenicity testing- all tests negative NOAEL (Rat, SGPT end point] 1,650 mg/kg body weight Urinary excretion [Rat] 100% (parent +metabolites) in 24 h

Answer 1

Answer :)

Log Pow value suggests that herbicide solubility in octanol. Here ratio is 1.3, which is suggesting that 13 g of herbicide soluble in 1L octanol.

The value of t1/2 [sterile soil] is suggesting that after 4.7 hours half of the herbicide content will degrade. That is also for the normal soil wherein the t1/2 value is 1.6 hour. The half-life at UV is suggesting that after 25.6 and 52.6 hours, under Ultraviolet light the particular herbicide degrades its half volume.

The EC50 value suggests that toxicity of the herbicide to particular organism in the context where 50% of the total population is died. Here daphnia, Trout and Chlorella are the test organisms.

The NOAEL is the no-observed-adverse-effect level for the exposure of a particular organism under which the herbicide does not show any adverse effect over the organism.

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