Toxicity of Fire Retardant Chemicals to Aquatic Organisms: Progress Report

Table 9

Table 9. Acute toxicity (96-hour LC50; mg/L; 95% confidence interval in parentheses) of five fire retardant chemicals to adult Hyalella azteca exposed in ASTM soft and hard waters. Asterisks denote significant difference (p=0.05) between soft and hard water for a test formulation. Letters in common (a-d for comparisons in soft water; w-y for comparisons in hard water) denote no significant difference (p=0.05) among test formulations.

Chemical	Water type	LC50 (mg/L)
Fire-Trol LCG-R	Soft	73^b*
		(42-115)
	Hard	535^x*
		(424-654)
Fire-Trol GTS-R	Soft	127^a*
		(92-172)
	Hard	363^w*
		(292-450)
Phos-Chek D-75-F	Soft	53^b*
		(49-65)
	Hard	394^wx*
		(310-519)
Phos-Chek WD-881	Soft	10^c*
		(6-17)
	Hard	22^y*
		(17-28)
Silv-Ex	Soft	24^d
		(20-30)
	Hard	27^y
		(22-35)