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Acute Toxicity of Fire Control Chemicals to Daphnia magna (Straus) and Selenastrum capricornutum (Printz)

Table 5

Table 5. Summary of the Ammonia Characteristics of Five Fire-Fighting Chemicals Used in Tests with S. capricornutum Exposed in ASTM Algal Assay Medium

Chemical	Concentration (mg/liter)	IC₅₀ (mg/liter)	Total ammonia (NH₃-N, mg/liter)		Un-ionized ammonia^a (mg/liter)
Chemical	Concentration (mg/liter)	IC₅₀ (mg/liter)	0 hr	96 hr	0 hr	96 hr
Fire-Trol GTS-R	3.6	18	0.74	0.01	0.00	0.00
	17		3.39	0.12	0.01	0.00
	47		9.57	7.83	0.03	0.02
Fire-Trol LCG-R	3.6	10	0.39	0.01	0.00	0.00
	17		1.79	1.31	0.00	0.00
	47		5.08	4.70	0.01	0.01
Phos-Chek D75-F	10	79	1.72	0.11	0.00	0.02
	47		7.96	3.95	0.01	0.00
	130		21.83	20.14	0.02	0.03
Phos-Chek WD-881	2.16	24	0.04	0.02	0.00	0.00
	10		0.03	0.02	0.00	0.00
	28		0.03	0.02	0.00	0.00
Silv-Ex	3.6	15	0.06	0.01	0.00	0.00
	17		0.13	0.01	0.00	0.00
	47		0.34	0.01	0.00	0.00
^a Un-ionized ammonia, total ammonia adjusted for temperature and pH.

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