Acute Toxicity of Fire-Retardant and Foam-Suppressant Chemicals to Hyalella azteca (Saussure)
Table 3
Table 3. Formulation of field mixtures for five fire-fighting chemicals and the ratio of the mixture concentration to the acute toxicity value.
| Chemical | Original units | Field mixturea (mg/L) | Water type | Ratio to 96-h LC50b |
| Fire-Trol GTS R | 1.66 lb/gal | 198,930 | Soft | 1,566 |
| Hard | 548 | |||
| Fire-Trol LCG-R | 1 gal/4.5 gal | 270,400 | Soft | 3,704 |
| Hard | 505 | |||
| Phos-Chek D75-F | 1.20 lb/gal | 143,800 | Soft | 2,713 |
| Hard | 365 | |||
| Phos-Chek WD-881 | 1% | 10,000 | Soft | 1,000 |
| Hard | 454 | |||
| Silv-Ex | 1% | 10,000 | Soft | 417 |
| Hard | 370 | |||
| aWeight or volume of the chemical concentrate combined with water to produce application mixture. bRatio: field mixture/mean lethal concentration (LC50) (mg/L). | ||||
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