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31 96-h LC50 Test Stage or Temp 95% CI organism wt (g) (C) (mg/L) DIMETHRIN Chemical Name: 2,4-Dimethylbenzyl-2,2-dimethyl-3-(2- methylpropenyl) cyclopropanecarboxylate. Fathead minnow' 0.9 20 > 100 Channel catfish' 2.2 22 > 100 Alternate Names: CAS 70-38-2, Dimethrine, ENT- 21170. Bluegill' 0.5 20 > 100 Principal Use: Insecticide (synthetic pyrethroid) 848-h EC50. Sample Description: Technical material, 100%. NOTE: Alterations in test conditions such as pH, tem- perature, and hardness did not affect the toxicity of di- flubenzuron. No adverse effects were observed when eyed eggs and fingerlings of rainbow trout were ex- posed in a flow-through system for 30 days to concen- trations of technical grade diflubenzuron of 0.029 to 0.30 mg/L. DIMETHOATE SUMMARY OF ACUTE TOXICITY 96-h LC50 Test Stage or Temp 95% CI organism wt (g) (C) (µg/L) Fathead minnow 1.4 13 628 51-76 Channel catfish F 12 1,140 1,018-1,275 Bluegill 0.5 12 38 28-50 Chemical Name: 0,0-Dimethyl S-(N-methylcar= bamoylmethyl) phosphorodithioate Alternate Names: AC-12880, Asthoate, CAS 60-51-5, Cygon, Daphene, De-Fend, Demos-1,40, Dimetho= gen, Diostop, ENT-24650, Fosfamid, Fosthion MM, L-395, Le-Kuo, Perfekthion, Rebelate, Rogor, Roxion, Trimethion Principal Use: Insecticide, acaricide Sample Description: Technical material, 97.4% SUMMARY OF ACUTE TOXICITY 96-h LC50 Test Stage or Temp 95% CI organism wt (g) (C) (mg/L) G.lacustris M 21 0.20 0.15-0.27 Pteronarcys YC2 21 0.043 0.036-0.051 Rainbow trout 1.5 13 6.2 4.1-9.3 Bluegill 0.3 24 6.0 NOTE: Variation in water hardness did not affect the toxicity to rainbow trout. Yellow perch 1.4 12 28 22-37 -Flow-through toxicity test. NOTE: Toxicity to bluegills did not change sig- nificantly with variations in pH from 6.5 to 9.5 or with water hardness from 12 to 300 ppm. A temperature increase from 12 ° to 22 °C decreased the toxicity to bluegills and increased the 96-h LC50 from 21 µg/L to 85 µg/L. No change in toxicity was noted in 1-week aqueous degradation tests at pH 6.5, 7.5, and 9.5. DINITRAMINE Chemical Name: N, 3N3-Diethyl-2,4-dinitro-6- (trifluoromethyl)-1, 3-phenylenediamine Alternate Names: Cobex, Cobexo, USB-3584 Principal Use: Herbicide Sample Description: Technical material, 99.2% SUMMARY OF ACUTE TOXICITY 96-h LC50 Test Wt Temp 95% CI organism (g) (C) (µg/L) Coho salmon 0.9 12 600 503-715