Acute Toxicity of Fire-Retardant and Foam-Suppressant Chemicals to Hyalella azteca (Saussure)
Table 1
Table 1. Acute toxicity (expressed as the mean lethal concentration [LC50]; mg/L; 95% confidence interval in parentheses) of five fire-retardant chemicals to adult Hyallela azteca exposed in American Society for Testing and Materials soft and hard watersa.
| Chemical | Water Type | Exposure Period | |
| 24 h | 96 h | ||
| Fire-Trol GTS-R | Soft Hard | 385 (312-482) 813 (627-992) | 127*A (92-172) 363W (292-450) |
| Fire-Trol LCG-R | Soft Hard | 417 (329-560) 961 (771-1183) | 73*B (42-115) 535X (424-654) |
| Phos-Chek D75-F | Soft Hard | 421 (317-610) 974 (752-1244) | 53*B (49-65) 394WX (310-519) |
| Phos-Chek WD-881 | Soft Hard | 45 (34-57) 46 (38-58) | 10*C (6-17) 22Y (17-28) |
| Silv-Ex | Soft Hard | 35 (27-45) 36 (29-45) | 24D (20-30) 27Y (22-35) |
| aValues with different letters (A-D for comparison in soft water; W-Y for comparison in hard water) or an aserisk (for comparison between soft and hard waters for each test chemical) are significantly different (p = 0.05); that is, LC50s with the same letter are not statistically different. | |||
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