Fatty acids, tall-oil, 1-methyl-1,2-ethanediyl esters

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:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

Qualifier:

according to guideline

Guideline:

EU Method A.6 (Water Solubility)

GLP compliance:

yes (incl. QA statement)

Type of method:

other: modified flask method

Key result

Water solubility:

0.1 mg/L

pH:

>= 7.2 - <= 7.5

Remarks on result:

other: The test was performed at room temperature

Details on results:

The results from the two individual tests were 0.08 and 0.11 mg/L with a mean value of 0.09 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	37.55	13.8	13.6	13.8	13.7	7.4	3.626	2.620
2	18.78	7.45	7.18	7.18	7.27	7.5	2.933	1.984
3	9.388	4.35	4.45	4.42	4.41	7.5	2.239	1.483
4	4.694	2.51	2.47	2.47	2.48	7.5	1.546	0.910
5	2.347	1.48	1.48	1.48	1.48	7.5	0.853	0.392
6	1.173	0.87	0.87	0.97	0.90	7.5	0.160	-0.102
7	0.5867	0.51	0.49	0.49	0.50	7.3	-0.533	-0.700
8	0.2934	0.28	0.33	0.32	0.31	7.2	-1.226	-1.171
9	0.1467	0.17	0.18	0.23	0.19	7.3	-1.919	-1.643
10	0.07334	0.15	0.08	0.14	0.12	7.3	-2.613	-2.093
11	0.03667	0.10	0.09	0.10	0.10	7.2	-3.306	-2.336
12	0.01833	0.17	0.09	0.11	0.12	7.3	-3.999	-2.093

 

Linear regression of points 1 to 9:	Linear regression of points 10 to 12:
y = 0.7669x - 0.2351	y^1= 0.0000x - 2.1741
When y = y^1, x = ln CMC
CMC = 0.08 mg/L

 

Run 2

Sample	Concentration	Turbidity measurements (NTU)				pH	ln	ln
	(mg/L)	1	2	3	Mean		concentration	turbidity
1	34.00	16.9	16.7	16.4	16.7	7.3	3.526	2.813
2	17.00	8.34	8.08	8.43	8.28	7.4	2.833	2.114
3	8.500	4.67	4.45	4.53	4.55	7.3	2.140	1.515
4	4.250	3.21	2.71	2.49	2.80	7.3	1.447	1.031
5	2.125	1.62	1.63	1.62	1.62	7.3	0.754	0.484
6	1.063	0.91	0.91	0.91	0.91	7.3	0.061	-0.094
7	0.5313	0.80	0.50	0.51	0.60	7.4	-0.632	-0.505
8	0.2656	0.25	0.30	0.25	0.27	7.3	-1.326	-1.322
9	0.1328	0.14	0.14	0.14	0.14	7.3	-2.019	-1.966
10	0.06641	0.06	0.14	0.17	0.12	7.3	-2.712	-2.093
11	0.03320	0.13	0.09	0.11	0.11	7.2	-3.405	-2.207
12	0.01660	0.08	0.15	0.07	0.10	7.2	-4.098	-2.303

 

Linear regression of points 1 to 9:	Linear regression of points 10 to 12:
y = 0.8318x - 0.1747	y^1= 0.1513x - 1.6858
When y = y^1, x = ln CMC
CMC = 0.11 mg/L

Description of key information

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

Key value for chemical safety assessment

Water solubility:

0.1 mg/L

at the temperature of:

20 °C