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Physical & Chemical properties

Solubility in organic solvents / fat solubility

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Administrative data

Endpoint:
solubility in organic solvents / fat solubility
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Test procedure according to method of Analytical Expert Group ETAD (Ecological and Toxicological Association of Dyes and Organic Pigment Manufacturer)
Cross-reference
Reason / purpose:
reference to same study

Data source

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

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
other: Analytical Expert Group ETAD
Principles of method if other than guideline:
About 5 mg of the test sample were suspended in 30 ml octanol (Aldrich, spectrophotometric grade) in a sample flask (standard flask for the Büchi Rack R-24, volume 30 ml) and were shaken for two hours at 30°C (+/- 2°C) on a "Büchi Syncore Polyvap" with 400 rpm. Then shaking was continued at ambient temperature (23 - 25°C) for 70 hours, followed by filtration through a 0.2 µm membrane filter and then through a 0.02 µm membrane filter
The resulting clear solution was measured by UV-vis spectrometry and the absorption was determined at 511 nm. The determination was repeated four times.

Calibration for determination of concentration of the samples applying the Lambert-Beer rule: calibration curve of Pigment Red 254 in sulfuric acid.

Test material

Reference
Name:
Unnamed
Type:
Constituent

Results and discussion

Solubility in organic solvents / fat solubility
Medium:
n-octanol
Solubility:
<= 2.7 µg/L
Temp.:
24 °C
Test substance stable:
yes

Applicant's summary and conclusion