Condensation products of triethanolamine with addition products of fatty acids, C18 (unsaturated) alkyl with maleic anhydride

Water solubility

Link to relevant study record(s)

Reference

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

Deviations:

yes

Remarks:

measurement of turbidity

Qualifier:

equivalent or similar to guideline

Guideline:

EU Method A.6 (Water Solubility)

Deviations:

yes

Remarks:

measurement of turbidity

GLP compliance:

yes (incl. QA statement)

Type of method:

other: modified flask method

Key result

Water solubility:

2.5 mg/L

pH:

7.1 - 7.4

Remarks on result:

other: The test was performed at room temperature

Details on results:

The results from the two individual tests were 3.4 and 1.7 mg/L with a mean value of 2.5 mg/L (calculated from non-rounded values, see Table 1).

Table 1: Turbidimetric determination of critical micelle concentration

 

Run 1

Sample	Concentration	Turbidity measurements (NTU)				pH	ln	ln
	(mg/L)	1	2	3	Mean		concentration	turbidity
1	440.2	46.6	46.6	46.6	46.6	7.1	6.087	3.842
2	220.1	23.7	23.7	23.7	23.7	7.1	5.394	3.165
3	110.1	12.8	12.7	13.0	12.8	7.2	4.701	2.552
4	55.03	6.48	6.38	6.38	6.41	7.1	4.008	1.858
5	27.51	3.49	3.47	3.40	3.45	7.2	3.315	1.239
6	13.76	1.91	1.90	1.90	1.90	7.2	2.622	0.644
7	6.878	0.79	0.79	0.80	0.79	7.1	1.928	-0.232
8	3.439	0.52	0.53	0.52	0.52	7.3	1.235	-0.648
9	1.720	0.53	0.35	0.36	0.41	7.3	0.542	-0.884
10	0.8598	0.52	0.44	0.37	0.44	7.1	-0.151	-0.813
11	0.4299	0.44	0.55	0.34	0.44	7.2	-0.844	-0.813
12	0.2149	0.48	0.48	0.42	0.46	7.2	-1.538	-0.777

 

Linear regression of points 1 to 8:	Linear regression of points 8 to 12:
y(1) = 0.9404x - 1.890	y(2) = 0.0271x - 0.7828
When y(1) = y(2), x = ln CMC
CMC = 3.4 mg/L

 

Run 2

Sample	Concentration	Turbidity measurements (NTU)				pH	ln	ln
	(mg/L)	1	2	3	Mean		concentration	turbidity
1	459.2	57.3	57.2	57.1	57.2	7.4	6.129	4.047
2	229.6	25.6	25.6	25.6	25.6	7.2	5.436	3.243
3	114.8	14.3	14.3	14.3	14.3	7.3	4.743	2.660
4	57.40	7.42	7.42	7.46	7.43	7.3	4.050	2.006
5	28.70	3.77	3.67	3.67	3.70	7.2	3.357	1.309
6	14.35	1.88	1.88	1.88	1.88	7.3	2.664	0.631
7	7.175	0.88	0.76	0.76	0.80	7.2	1.971	-0.223
8	3.589	0.38	0.38	0.37	0.38	7.2	1.278	-0.976
9	1.794	0.22	0.18	0.17	0.19	7.2	0.584	-1.661
10	0.8969	0.16	0.16	0.16	0.16	7.2	-0.109	-1.833
11	0.4484	0.18	0.18	0.20	0.19	7.3	-0.802	-1.678
12	0.2242	0.16	0.15	0.16	0.16	7.1	-1.495	-1.854

 

Linear regression of points 1 to 9:	Linear regression of points 9 to 12:
y(1) = 1.025x - 2.215	y(2) = 0.0612x - 1.729
When y(1) = y(2), x = ln CMC
CMC = 1.7 mg/L

 

Conclusions:

Interpretation of results (migrated information): slightly soluble (0.1-100 mg/L)

Description of key information

2.5 mg/L at 20 °C, pH 7 (OECD 105 and EU A.6)

Key value for chemical safety assessment

Water solubility:

2.5 mg/L

at the temperature of:

20 °C