Table 8.2.6.7 The Effects of Chlorophenols on Daphnia magna

line

mg/L	Conditions	Effect	Ref.
	2-MCP
1.0	pH 7.4-9.4, 22C, hardness 173 mg/L *	NOEL	56
1.35		7-d EC₅₀	400
2.6		96-h LC₅₀	335
2.6	pH 7.4-9.4, 22C, hardness 173 mg/L *	48-h LC₅₀	56
3.73		7-d LC₅₀	400
7.4	18C, static bioassay	48-h LC₅₀	189
10.0	pH 8.0, static bioassay for immobility	NOEL	384
>22	pH 7.4-9.4, 22C, hardness 173 mg/L *	24-h LC₅₀	56
23	pH 8.0, static bioassay for immobility	24-h EC₅₀	384
	4-MCP
0.64		7-d EC₅₀	400
1.0	mobility bioassay	14-d NOEL	371
1.1	pH 7.4-9.4, 22C, hardness 173 mg/L *	NOEL	56
4.06	static bioassay	48-h EC₅₀	372
4.06	pH 7.4-9.4, 22C, hardness 173 mg/L *	48-h LC₅₀	56
2.31		7-d EC₅₀	400
4.82	18C, static bioassay	48-h EC₅₀	189
4.82	18C, static bioassay	48-h EC₅₀	372
8.8	pH 7.4-9.4, 22C, hardness 173 mg/L *	24-h LC₅₀	56
8.9		48-h LC₅₀	371
10.0	mobility bioassay	LD50	371
	2,4-DCP
0.46	pH 7.4-9.4, 22C, hardness 173 mg/L *	NOEL	56
2.3	static bioassay	21-d LC₅₀	354
2.6	pH 7.4-9.4, 22C, hardness 173 mg/L *	48-h LC₅₀	56
2.61	18C, static bioassay	48-h LC₅₀	189
2.8	pH 8, static immobility bioassay	24-h EC₀	384
3.9	pH 8, static immobility bioassay	24-h EC₅₀	384
5.1	static bioassay	48-h LC₅₀	354
>10	pH 7.4-9.4, 22C, hardness 173 mg/L *	24-h LC₅₀	56
	2,4,5-TCP
0.78	pH 7.4-9.4, 22C, hardness 173 mg/L *	NOEL	56
0.89		7-d EC₅₀	400
2.66	pH 7.4-9.4, 22C, hardness 173 mg/L *	48-h LC₅₀	56
3.6		7-d EC₅₀	400
3.8	pH 7.4-9.4, 22C, hardness 173 mg/L *	24-h LC₅₀	56

Table 8.2.6.7 (continued)

mg/L	Conditions	Effect	Ref.
	2,4,6-TCP
<0.41	pH 7.4-9.4, 22C, hardness 173 mg/L *	NOEL	56
0.69		2-d EC₅₀	400
3.34		2-d EC₅₀	400
6.04	pH 7.4-9.4, 22C, hardness 173 mg/L *	48-h LC₅₀	56
15	pH 7.4-9.4, 22C, hardness 173 mg/L *	24-h LC₅₀	56
	2,3,4,6-TTCP
0.01	pH 7.4-9.4, 22C, hardness 173 mg/L *	NOEL	56
0.29	pH 7.4-9.4, 22C, hardness 173 mg/L *	48-h LC₅₀	56
0.05	74% tech. grade, 17C, pH 7.5, hardness 44 mg/L as CaCO3	28-d NOEL	236
>1.0	pH 7.4-9.4, 22C, hardness 173 mg/L *	24-h LC₅₀	56
	2,3,5,6-TTCP
0.01	pH 7.4-9.4, 22C, hardness 173 mg/L *	NOEL	56
0.57	pH 7.4-9.4, 22C, hardness 173 mg/L *	48-h LC₅₀	56
2.5	pH 7.4-9.4, 22C, hardness 173 mg/L *	24-h LC₅₀	56
	PCP
0.047	survival	3-wk LC₀	416
0.047	young per female, 3 weeks exposure	102	416
0.1		LC₅₀	182
0.100	reproduction, life cycle, pH 8.0, 20 C	NOEL	762
0.139	survival	3-wk LC₂₀	416
0.139	young per female	91	416
0.143	hardness 45 mg/L	48-h LC₅₀	111
0.145	pH 8.0, 22.5C	LC₅₀	114
0.16	98% PCP, 19C	NOEL	112
0.17	pH 8.0, 20C, hard water	21-d LC₅₀	84
0.18	chronic assay	NOEL	84
0.18	chronic assay	NOEL	93
0.19	pH 8.0, 20C, hard water	21-d LC₅₀	84
0.23		EC₅₀	253
0.24	96% PCP, 17C, pH 7.4, hardness 40 mg/L	48-h EC₅₀	111
0.24	chronic assay	EC	205
0.24	20C, hard water, 1 day old	48-h LC₅₀	83
0.24	static bioassay	48-h EC₅₀	205
0.25	pH 8.0, 20C, hard water, chronic assay	21-d EC₀	84
0.25	pH 8.0, 20C, hard water, chronic assay	21-d EC₀	205
0.26	20C,hard water,1 day old	48-h LC₅₀	83

Table 8.2.6.7 (continued)

mg/L	Conditions	Effect	Ref.
0.26	static bioassay	48-h EC₅₀	205
0.32	pH 7.4-9.4, 22C, hardness 173 mg/L *	NOEL	56
0.32	88% PCP, 17C, pH 7.4 hardness 40 mg/L, 1st. instar	48-h EC₅₀	111
0.336	survival	3-wk LC₂₅	416
0.336	young per female, 3 weeks exposure	87	416
0.34	reproduction assay, 1 mm long young	21-d NOEL	217
0.37	chronic effects, pH 8.0, 20C, hard water	21-d EC₀	85
0.40	pH 8.0, hard water	7-d LC₅₀	85
0.40	pH 8.0, hard water	14-d LC₅₀	85
0.40	pH 8.0, 20 C, hard water	21-d LC₅₀	84
0.40	20C, hard water, 1 day old	48-h LC₅₀	83
0.40	static bioassay	48-h EC₅₀	205
0.4	1 mm young	14-d LC₅₀	85
0.4	1 mm young	21-d LC₅₀	85
0.41	86 % PCP, 17C, pH 7.4 hardness 40 mg/L	48-h EC₅₀	111
0.43	20C	21-d LC₅₀	84
0.43	20C	21-d LC₅₀	205
0.44	pH 8.0, 20C, hard water	14-d LC₅₀	84
0.46	pH 8.0, 20C, hard water	14-d LC₅₀	84
0.46	24C	21-d LC₅₀	84
0.46	24C	21-d LC₅₀	205
0.47	pH 8.0, 20C, hard water	21-d LC₅₀	84
0.48	98 % PCP, 19C	48-h LC₅₀	112
0.48	pH 8.0, 20C, hard water	21-d LC₅₀	84
0.49	pH 8.0, 20C, hard water	21-d LC₅₀	84
0.49	15C	21-d LC₅₀	84
0.49	15C	21-d LC₅₀	205
0.49	pH 7.7, 22C, hardness 200 mg/L alkalinity 110 mg/L, conductivity 560	48-h LC₅₀	80
0.500	reproduction, life cycle, pH 8.0, 20 C	LOEL	762
0.51-0.84	hardness 170 mg/L	48-h LC₅₀	82
0.51	pH 8.0, 20C, hard water	21-d LC₅₀	84
0.58	3 mm adults	7-d LC₅₀	85
0.6	pH 8.0, hard water	96-h LC₅₀	85
0.6	1 mm young	7-d LC₅₀	85
0.6	20C, static bioassay, 1 day old, not fed	48-h LC₅₀	84
0.68	3 mm adults	96-h LC₅₀	85

Table 8.2.6.7 (continued)

mg/L	Conditions	Effect	Ref.
0.68	pH 7.4-9.4, 22C, hardness 173 mg/L *	48-h LC₅₀	56
0.79	static bioassay	48-h EC₅₀	205
0.79	20C, hard water, 1 day old	48-h LC₅₀	83
0.8	1 mm long young	48-h LC₅₀	85
0.8		21-d LC₅₀	253
0.8	20C, static bioassay, 7 days old, not fed	48-h EC₅₀	84
0.9	pH 7.8, 22C, hardness 120 mg/L alkalinity 110 mg/L, conductivity 560	48-h LC₅₀	80
1.0	young per female, 3 weeks exposure	0	416
1.0	survival	3-wk LC₁₀₀	416
1.0	20C, static bioassay, 1 day old, fed	48-h EC₅₀	84
1.0	pH 8.0, 23C, hardness 240 mg/L, alkalinity 230 mg/L, conductivity 360	48-h EC₅₀	58
<1.0		24-h EC	70
1.04	pH 7.8, 22C, hardness 120 mg/L, alkalinity 110 mg/L, conductivity 560	48-h LC₅₀	80
1.05	pH 8.0, hard water	48-h LC₅₀	85
1.05	1 mm long young	48-h LC₅₀	85
1.12	pH 7.7, 22C, hardness 200 mg/L, alkalinity 110 mg/L, conductivity 340	48-h LC₅₀	80
1.2	static bioassay, 20C, 1 day old, not fed	48-h EC₅₀	84
1.3	static bioassay, 20C, 7 days old, not fed	24-h EC₅₀	84
1.4	3 mm long adults	48-h LC₅₀	85
1.5	static bioassay, 20C, 7days old, fed	48-h EC₅₀	84
1.5	pH 7.4-9.4, 22C, hardness 173 mg/L *	24-h LC₅₀	56
1.7	1 mm long young	24-h LC₅₀	85
1.7	static bioassay, 20C, 1 days old, fed	24-h EC₅₀	84
2.8	static bioassay, 20C, 7 days old, fed	24-h EC₅₀	84
	NaPCP
0.2	reproduction effects, hardness 90 mg/L	NOEL	417
0.4	adult survival, hardness 90 mg/L	NOEL	417
0.4	reproduction effects, hardness 90 mg/L	1- wk EC	417
0.6	adult survival, hardness 90 mg/L	1- wk EC	417

Reference 57 data in Table 2.4.
* dissolved oxygen is 6.5 to 9.1 mg/L.