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Administrative data

Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Study period:
April 10 - 16, 1991
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1991
Report date:
1991

Materials and methods

Test guideline
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 105 (Water Solubility)
Deviations:
yes
Remarks:
Because the test substance concentration could not be quantified in water samples using GC analysis, an alternative preliminary test was performed using visual observation.
Principles of method if other than guideline:
Because the test substance concentration could not be quantified in water samples using GC analysis, an alternative preliminary test was performed using visual observation.
Preliminary test 1:
An amount of approximately 300 mg of the test substance was added to 200 ml double distilled water and stirred overnight at room temperature. Then a sample of 10 m1 was taken and analysed using the method of chemical analysis as described in the attached study report.
Preliminary test 2:
An alternative test was performed to determine the water solubility of the test substance. Different accurately weighed amounts of test substance were added to double distilled water, using volumetric flasks. The solutions with concentrations below 0.25 g/1 were prepared by dilution of the more concentrated solutions. The solutions were checked for solid particles by means of visual observation. The 2 solutions with the lowest concentrations were visually checked for solid particles using a microscope.
GLP compliance:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
α-trimethylsilanyl-ω-trimethylsiloxypoly[oxy(methyl-3-(2-(2-methoxypropoxy)propoxy)propylsilanediyl]-co-oxy(dimethylsilane))
EC Number:
406-420-4
EC Name:
α-trimethylsilanyl-ω-trimethylsiloxypoly[oxy(methyl-3-(2-(2-methoxypropoxy)propoxy)propylsilanediyl]-co-oxy(dimethylsilane))
Cas Number:
69430-40-6
Molecular formula:
Unspecified example: C18.3H46.8O5.8Si4.1
IUPAC Name:
α-trimethylsilanyl-ω-trimethylsiloxypoly[oxy(methyl-3-(2-(2-methoxypropoxy)propoxy)propylsilanediyl]-co-oxy(dimethylsilane))
Details on test material:
Identification: DC 5067
Description: Clear, light brown liquid
Lot Number: AB 090122
Purity: >99%
Storage conditions: In the original container at room temperature in the dark
Stability under storage conditions: Stab1e
Expiry date: December 1, 1991

Results and discussion

Water solubility
Water solubility:
>= 0.25 - <= 2.5 mg/L
Temp.:
20 °C
pH:
>= 6 - <= 8

Applicant's summary and conclusion

Conclusions:
Interpretation of results (migrated information): slightly soluble (0.1-100 mg/L) Estimated range: 0.25 - 700 mg/l
Based on the complexity of DC 5067, the water solubility was estimated to be between 0.25 mg/l and 0.7 g/l .
Executive summary:

In conclusion, based on the complexity of DC 5067, the water solubility was estimated to be between 0.25 x 10-3 g/l and 0.7 g/l . During the first preliminary test it was found that the concentration of DC 5067 could not be quantified in water samples using a Gas Chromatographic (GC) method. Therefore, a second alternative preliminary test was performed using visual observation. From the results of the first preliminary test, the water solubility of DC 5067 was roughly estimated to be 0.7 g/l. From the results of the second preliminary test, the water solubility of DC 5067 was estimated to be (0.25 - 2.5) x 10-3 g/l.

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