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Diss Factsheets

Administrative data

Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Study period:
30 March 2010 – 28 May 2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: This study has been performed according to OECD and EC guidelines and according to GLP principles.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2010
Report date:
2010

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
OECD Guideline 105 (Water Solubility)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.6 (Water Solubility)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
flask method

Test material

Constituent 1
Reference substance name:
Vetiveria zizanioides, ext.
EC Number:
282-490-8
EC Name:
Vetiveria zizanioides, ext.
Cas Number:
84238-29-9
Molecular formula:
Not available due to the UVCB nature of the substance
IUPAC Name:
Essential oil of Vetiveria zizanioides (Poaceaes)
Details on test material:
- Name of test material (as cited in study report): Vetiveria zizanioides, ext.
- Substance type: Clear brown liquid
- Physical state: liquid
- Analytical purity: treated as 100% pure
- Lot/batch No.: ADL 53 901
- Expiration date of the lot/batch: 04 January 2011
- Stability under test conditions: stable
- Storage condition of test material: At room temperature in the dark
- Other: -

Results and discussion

Water solubility
Water solubility:
< 1.77 mg/L
Temp.:
20 °C
pH:
7.2
Details on results:
The results of the preliminary test and the main study are not in agreement. In the nominal 16.4 mg/l test solution used in the preliminary test, undissolved material was observed whereas in the main study a water solubility of 26.7 mg/l was measured. An explanation for the difference found is that part of the test substance has a low solubility. In order to get a water solubility value for the complete test substance which is as low as possible, the additional test was performed. After the stirring period of this test, undissolved test substance was observed in the test sample. From this, it was concluded that the water solubility of Vetiveria zizanioides, ext. at 20°C was < 1.77 x 10-3 g/l but that there are compounds in the test substance that have higher water solubility. The pH of the aqueous sample was 7.2.

Applicant's summary and conclusion

Conclusions:
Interpretation of results (migrated information): other: between insoluble and slightly soluble
The flask method was used for the determination of the water solubility of Vetiveria zizanioides, ext.. The water solubility of the test substance at 20°C was < 1.77 x 10^-3 g/l but there are compounds in the test substance that have higher water solubility. The pH of the aqueous sample after 72 hours stirring was 7.2.
Executive summary:

The flask method was used for the determination of the water solubility of Vetiveria zizanioides, ext.. The water solubility of the test substance at 20°C was < 1.77 x 10^-3 g/l but there are compounds in the test substance that have higher water solubility. The pH of the aqueous sample after 72 hours stirring was 7.2.