PAN Pesticides Database - Chemical Toxicity Studies on Aquatic Organisms

Acute Aquatic Ecotoxicity Summaries for Chlorpyrifos on Zooplankton

Use(s): Insecticide, Nematicide    Chem Class: Organophosphorus    U.S. EPA PC Code:059101    CAS Number: 2921-88-2
Sorted by Organism Group, Scientific Name and LC50. Species summary toxicity data are derived from the U.S. EPA AQUIRE database.
Records 1 to 26 of 26
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Common Name Scientific Name Avg Species LC50 (ug/L) LC50 Std Dev Number of Studies Avg Species Rating Outlier Result for Organism Group?

Zooplankton

Opossum shrimp Americamysis bahia 0.12 0.12 4 Very Highly Toxic  
Harpacticoid copepod Amphiascus tenuiremis 4.03 2.78 4 Very Highly Toxic  
Scud order Amphipoda 0.11 - 1 Very Highly Toxic  
Brine shrimp Artemia franchiscana 18,000 - 3 Slightly Toxic Outlier 
Brine shrimp Artemia parthenogenetica 7,327 7,707 3 Moderately Toxic  
Brine shrimp Artemia salina 969.0 1,168 5 Highly Toxic  
Brine shrimp Artemia sp. 18,000 - 5 Slightly Toxic Outlier 
Rotifer Brachionus calyciflorus 11,950 63.2 5 Slightly Toxic  
Rotifer Brachionus plicatilis 10,670 - 1 Slightly Toxic  
Water flea Ceriodaphnia dubia 0.08 0.02 23 Very Highly Toxic  
Copepod subclass Copepoda 1.54 0.60 2 Very Highly Toxic  
Water flea Daphnia ambigua 0.04 - 1 Very Highly Toxic  
Water flea Daphnia carinata 0.31 0.10 5 Very Highly Toxic  
Water flea Daphnia longispina 0.55 0.25 2 Very Highly Toxic  
Water flea Daphnia magna 1.05 1.22 6 Very Highly Toxic  
Water flea Daphnia pulex 0.63 0.70 19 Very Highly Toxic  
Water flea Daphnia sp. 0.88 - 1 Very Highly Toxic  
Calanoid copepod Diaptomus forbesi 3.60 - 1 Very Highly Toxic  
Scud Gammarus fasciatus 2.96 2.64 2 Very Highly Toxic  
Scud Gammarus fossarum 1.02 - 1 Very Highly Toxic  
Scud Gammarus lacustris 0.42 0.27 3 Very Highly Toxic  
Scud Gammarus pseudolimnaeus 0.23 0.07 3 Very Highly Toxic  
Scud Gammarus pulex 0.07 0.0050 2 Very Highly Toxic  
Scud Hyalella azteca 0.09 0.06 19 Very Highly Toxic  
Daggerblade grass shrimp Palaemonetes pugio 0.46 0.25 11 Very Highly Toxic  
Water flea Simocephalus vetulus 0.45 0.31 3 Very Highly Toxic  
Records 1 to 26 of 26
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