PAN Pesticides Database - Chemical Toxicity Studies on Aquatic Organisms

Acute Aquatic Ecotoxicity Summaries for Malathion on Zooplankton

Use(s): Insecticide    Chem Class: Organophosphorus    U.S. EPA PC Code:057701, 857701    CAS Number: 121-75-5
Sorted by Organism Group, Scientific Name and LC50. Species summary toxicity data are derived from the U.S. EPA AQUIRE database.
Records 1 to 25 of 25
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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

Water flea Alonella sp. 2.00 - 1 Very Highly Toxic  
Opossum shrimp Americamysis bahia 3.78 1.27 11 Very Highly Toxic  
Scud order Amphipoda 1.00 - 1 Very Highly Toxic  
Brine shrimp Artemia salina 22,593,316 39,032,284 4 Not Acutely Toxic Outlier 
Rotifer Brachionus calyciflorus 323,082 447,194 4 Not Acutely Toxic  
Rotifer Brachionus plicatilis 52,500 7,000 2 Slightly Toxic  
Rotifer Brachionus rubens 35,300 - 1 Slightly Toxic  
Water flea Ceriodaphnia dubia 2.19 0.82 18 Very Highly Toxic  
Cyclopoid copepod Cyclops viridis 1,300 - 1 Moderately Toxic  
Water flea Daphnia carinata 162.0 181.3 5 Highly Toxic  
Water flea Daphnia magna 10.2 17.5 13 Very Highly Toxic  
Water flea Daphnia pulex 37.6 42.4 5 Very Highly Toxic  
Calanoid copepod Diaptomus sp. 2.00 - 1 Very Highly Toxic  
Cyclopoid copepod Eucyclops sp. 1.00 - 1 Very Highly Toxic  
Scud Gammarus fasciatus 1.12 0.87 9 Very Highly Toxic  
Scud Gammarus lacustris 1.73 0.09 5 Very Highly Toxic  
Scud Hyalella sp. 0.11 0.06 3 Very Highly Toxic  
Water flea Moina macrocopa 58.0 - 2 Very Highly Toxic  
Grass shrimp,freshwater prawn Palaemonetes kadiakensis 64.2 45.9 9 Very Highly Toxic  
Daggerblade grass shrimp Palaemonetes pugio 16.6 12.6 11 Very Highly Toxic  
Marsh grass shrimp Palaemonetes vulgaris 101.0 21.5 3 Highly Toxic  
Water flea Simocephalus vetulus 2.90 - 1 Very Highly Toxic  
Protozoa Spirostomum ambiguum 73,700 - 1 Slightly Toxic  
Ciliate Tetrahymena pyriformis 12,600 400.0 2 Slightly Toxic  
Harpacticoid copepod Tigriopus brevicornis 17.3 7.33 3 Very Highly Toxic  
Records 1 to 25 of 25
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