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Physical & Chemical properties

Water solubility

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Reference
Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2013
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
The study was conducted according to internationally accepted test guidelines and is considered relevant, adequate and reliable.
Qualifier:
according to guideline
Guideline:
OECD Guideline 105 (Water Solubility)
Deviations:
yes
Remarks:
visual assesment only
Qualifier:
according to guideline
Guideline:
EU Method A.6 (Water Solubility)
Deviations:
yes
Remarks:
visual assesment only
Principles of method if other than guideline:
The water solubility is determined by visual inspection. The highest concentration at which the solution appears clear is taken as the water solubility.
GLP compliance:
no
Type of method:
flask method
Water solubility:
ca. 10 mg/L
Temp.:
20 °C
pH:
ca. 8.7
Details on results:
Two measurements were performed. The results can be found in the tables.

 Table 1: Results for water solubility for Sample A

Sample measurement (20 °C):

Sample A

Dilution factor

Concentration

[mg / L]

Turbidity

[NTU]

1

4321

---

10

432.1

423

20

216.05

176

50

86.24

53.1

100

43.21

32.4

200

21.605

9.01

500*

8.624

2.93

1000*

4.321

1.83


* Visually the solution is clear

 Table 2: Results for water solubility for Sample B

Sample measurement (20 °C):

Sample B

Dilution factor

Concentration

[mg / L]

Turbidity

[NTU]

1

5368

---

10

536.8

446

20

268.4

198

50

107.36

65.5

100

53.68

36.6

200

26.84

11.5

500*

10.736

3.43

1000*

5.368

2.38


* Visually the solution is clear

 

Conclusions:
Interpretation of results (migrated information): slightly soluble (0.1-100 mg/L)
The water solubility is measured to be around 10 mg/L.
Executive summary:

Water Solubility of Fatty acids, C16-18 and C18-unsatd., compds. with triethanolamine was determined according to test procedure L 142 A/57-66 (A.6.) and OECD Guideline 105. Water Solubility was determined at 20 °C using the flask method. Incipient insolubility was detected by turbidity measurements.

The Water Solubility of Fatty acids, C16-18 and C18-unsatd., compds. with triethanolamine could not be determined via turbidity measurements due to the fact, that test item solutions in the range of few mg/L already form emulsions.

Visual examinations of solutions with concentrations of 10 mg/L or below appear clear. Due to this, the Water Solubility of Fatty acids, C16-18 and C18-unsatd., compds. with triethanolamine can be estimated to approx. 10 mg/L.

Description of key information

The water solubility is measured to be around 10 mg/L.

Key value for chemical safety assessment

Water solubility:
10 mg/L
at the temperature of:
20 °C

Additional information

Water Solubility of Fatty acids, C16-18 and C18-unsatd., compds. with triethanolamine was determined according to test procedure L 142 A/57-66 (A.6.) and OECD Guideline 105. Water Solubility was determined at 20 °C using the flask method. Incipient insolubility was detected by turbidity measurements.

The Water Solubility of Fatty acids, C16-18 and C18-unsatd., compds. with triethanolaminecould not be determined via turbidity measurements due to the fact, that test item solutions in the range of few mg/L already form emulsions.

Visual examinations of solutions with concentrations of 10 mg/L or below appear clear. Due to this, the Water Solubility of Fatty acids, C16-18 and C18-unsatd., compds. with triethanolamine can be estimated to approx. 10 mg/L.