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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:
27 Oct 2016 to 02 Nov 2016
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)
Remarks:
Staatliches Gewerbeaufsichtsamt Hildeshelm
Type of method:
flask method
Remarks:
with slow stirring approach
Key result
Water solubility:
1.32 g/L
Temp.:
20 °C
pH:
4.9

Results

Water solubility results at 20 °C

Sampling at equilibrium

Incubation time1)[h]

Calculated Concentration2)

[g/L]

Overall

Replicate 1

Replicate 2

 

1

90.60

1.299

1.307

2

93.10

1.321

1.325

3

95.27

1.315

1.343

4

113.68

1.304

1.322

5

115.68

1.337

1.306

6

117.68

1.308

1.327

 

Mean

1.3

1.32

1.32

 

Deviation [%]

3.0

2.9

0.6

1)     = Time after application

2)     = Dilution factor of 10 and exact weight of the external standard taken into account

 

pH-Value was checked at the end of test. It was determined to be 4.9 (mean value of two measurements).

All samples were checked negative for a Tyndall effect verifying the absence of colloidal dispersed matter.

The test samples showed a change of the component pattern with higher proportion for component 1 (lowest retention time) compared to the standard samples.

Validity Criteria

The study was performed based on OECD Guideline 105 for Testing of Chemicals (1995) and Council Regulation (EC) No. 260/2014, Method A.6. The validity criteria were fulfilled:

 

-       The concentration measured did not differ by more than 15 %.

-       The slope of the concentration vs. time regression graph was statistically not significantly different from zero (minimum of five samplings).

-       Temperatures were kept constant within ± 0.5 °C.

-       The concentration measured for each replicate sampling did not differ by more than 30% (minimum of five samplings).

 

Conclusions

The solubility of the test item was determined to be 1.32 g/L (pH 4.9) at 20 ± 0.5 °C.

Conclusions:
A water solubility value of 1.32 g/L (at 20 °C, pH 4.9) was determined for the test substance according to E.U. Method A.6.

Description of key information

Water solubility: 1.32 g/L at 20 °C, pH = 4.9 (EU Method A.6., slow stirring flask method)

Key value for chemical safety assessment

Water solubility:
1.32 g/L
at the temperature of:
20 °C

Additional information

A water solubility value of 1.32 g/L (at 20 °C, pH 4.9) was determined for the test substance according to E.U. Method A.6.