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Diss Factsheets

Administrative data

Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2006-02-22 to 2006-05-12
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2006
Report date:
2006

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
EU Method A.6 (Water Solubility)
Version / remarks:
July 31, 1992
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
flask method

Test material

Constituent 1
Chemical structure
Reference substance name:
Methyltriphenylphosphonium bromide
EC Number:
217-218-9
EC Name:
Methyltriphenylphosphonium bromide
Cas Number:
1779-49-3
Molecular formula:
C19H18P.Br
IUPAC Name:
methyl(triphenyl)phosphonium bromide
Test material form:
solid: crystalline

Results and discussion

Water solubilityopen allclose all
Key result
Water solubility:
342 g/L
Conc. based on:
test mat.
Temp.:
20 °C
pH:
>= 6.3 - <= 6.8
Remarks on result:
other: mean value
Key result
Water solubility:
349.3 g/L
Conc. based on:
test mat.
Incubation duration:
24 h
Temp.:
20 °C
pH:
6.8
Key result
Water solubility:
340.3 g/L
Conc. based on:
test mat.
Incubation duration:
48 h
Temp.:
20 °C
pH:
6.7
Key result
Water solubility:
337.6 g/L
Conc. based on:
test mat.
Incubation duration:
72 h
Temp.:
20 °C
pH:
6.3
Details on results:
shaking time 24 h 349.3 g/L
shaking time 48 h 340.3 g/L
shaking time 72 h 337.6 g/L
mean value: 342 g/L

Any other information on results incl. tables

After finishing of shaking and equilibration period in all flasks a white surplus of the test item was found. This means that the resulting solutions were saturated with test item. Not any changes of colour or structure of the non solved test item were observed.

The mean values of the water solubilities of all three different shaking times and a equilibration period of 24 h at 20 °C are summerized in the following table:

Table 1:

Mean value of water solubility

shaking time [h]

concentration [g/L]

24

349.3

48

340.3

72

337.6

Mean value

342

standard deviation

6.1

coefficient of variation [%]

1.8

The individual results from each of the flasks (24, 48 and 72 h) should not differ by more than 15 %. This criterion is kept.

Applicant's summary and conclusion

Conclusions:
In the present study conducted according to EU method A.6 (July 31, 1992) the water solubility of the test substance was determined by the flask method and verified by HPLC. The concentrations were stable during the experiment, thus, the test item is considered to be good soluble in water (> 100 mg/L).
The mean value of the concentrations of the test item in water is 342 g/L at 20 °C.