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Standard Practice for Using Octanol-Water Partition Coefficient to Estimate Median Lethal Concentrations for Fish Due to Narcosis
STANDARD published on 10.2.1997
Designation standards: ASTM E1242-97
Note: WITHDRAWN
Publication date standards: 10.2.1997
SKU: NS-40988
The number of pages: 2
Approximate weight : 6 g (0.01 lbs)
Country: American technical standard
Category: Technical standards ASTM
Keywords:
non-ionic, beta-gamma- unsaturated alcohols, ICS Number Code 07.080 (Biology. Botany. Zoology)
1. Scope | ||||||||
1.1 This practice covers a procedure for estimating the fathead minnow (Pimephales promelas) 96-h LC50 of nonreactive (that is, covalently bonded without unsaturated residues) and nonelectrolytic (that is, require vigorous reagents to facilitate substitution, addition, replacement reactions and are non-ionic, non-dissociating in aqueous solutions) organic chemicals acting solely by narcosis, also referred to as Meyer-Overton toxicity relationship. 1.2 This procedure is accurate for organic chemicals that are toxic due to narcosis and are non-reactive and non-electrolytic. Examples of appropriate chemicals are: alcohols, ketones, ethers, simple halogenated aliphatics, aromatics, and aliphatic substituted aromatics. It is not appropriate for chemicals whose structures include a potential toxiphore (that structural component of a chemical molecule that has been identified to show mammalian toxicity, for example CN is known to be reponsible for inactivation of enzymes, NO2 for decoupling of oxidative phosphorylation, both leading to mammalian toxicity). Examples of inappropriate chemicals are: carbamates, organophosphates, phenols, beta-gamma unsaturated alcohols, electrophiles, and quaternary ammonium salts. |
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2. Referenced Documents | ||||||||
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