5 Diethyl Phthalate (DEP), Danish Environmental Protection Agency

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	Table 5.3. Toxicity of Diethyl phthalate to micro-organisms	Review of Environmental Fate and Effects of Selected Phthalate Esters &NBSP;

Test species	(F/S)	N/M	Test duration	Endpoint	EC₅₀ or LC₅₀ (mg/l)	NOEC (LOEC) (mg/l)	Reference
Tetrahymena pyriformis	F	N	24 h	Growth inhibition	&NBSP;	50 (100)	/20/
Tetrahymena pyriformis	F	N	48 h	Growth inhibition	132	50 (100)	/21/
Laboratory digester culture	F	M	5-193 h	Anaerobic metabolic inhibitor	&NBSP;	100	/48/
Entosiphon sulcatum	F	N	72 h	5% reproduction inhibition	&NBSP;	TT=19	/49/
Photobacterium phosphoreum	S	N	5-30 min	Light inhibition	111	&NBSP;	/50/
Pseudomonas putida	F	N	16 h	3% reproduction inhibition	&NBSP;	TT=400	/51, 49/
Uronema parduczi	F	N	20 h	5% reproduction inhibition	&NBSP;	TT=48	/52/

F: Fresh water; S: Salt water; N: Nominal; M: Measured concentration; NOEC: No Observed Effect Concentration; LOEC: Lowest Observed Effect Concentration. TT: Toxicity Threshold = geometric mean of NOEC and LOEC.