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Quantitative structure‐activity relationships for the acute toxicity of chlorobenzenes to Daphnia magna
Author(s) -
Bobra Alice,
Shiu Wan Ying,
Mackay Donald
Publication year - 1985
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.5620040305
Subject(s) - daphnia magna , partition coefficient , quantitative structure–activity relationship , chemistry , solubility , chlorobenzene , environmental chemistry , vapor pressure , boiling point , octanol , ecotoxicity , organism , ec50 , aqueous solution , toxicity , chromatography , organic chemistry , stereochemistry , biology , biochemistry , paleontology , in vitro , catalysis
The relationships between physical‐chemical properties of aqueous solubility, octanol/water partition coefficient, vapor pressure, boiling and melting points and Henry's Law constant are discussed and illustrated for the chlorobenzenes. It is suggested that a critical review of such data is an essential component of quantitative structure‐activity relationship (QSAR) development and can elucidate the potential for air/water and organism/water partitioning during bioas‐says. Experimental 48‐h EC50 data are reported for Daphnia magna in a closed system and relationships established between EC50, solubility and octanol/water partition coefficient. It is suggested that when presenting QSAR data, logarithmic plots should be prepared of the toxic concentration versus both solubility and octanol/water partition coefficient. The results indicate that in this case the toxic effect is nonspecific in nature and that the EC50 is controlled primarily by organism/water partitioning.