Bisbenzimidazo[2,1-b:1',2'-j]benzo[lmn][3,8]phenanthroline-6,9-dione

Solubility in organic solvents / fat solubility

Link to relevant study record(s)

Reference

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:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Remarks:

Test procedure according to method of Analytical Expert Group ETAD (Ecological and Toxicological Association of Dyes and Organic Pigment Manufacturer)

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

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 two 0.2 µm membrane filters.
The resulting clear solution was measured by UV-vis spectrometry and the absorption was determined at 400 nm. The determination was repeated three times.

Calibration for determination of concentration of the samples applying the Lambert-Beer rule: calibration curve of Pigment Red 194 in trifluoroacetic acid.

Medium:

n-octanol

Solubility:

0.55 mg/L

Temp.:

24 °C

Test substance stable:

yes

Key value for chemical safety assessment

At the temperature of:

24 °C

Solubility in organic solvents at 20°C:

0.55 mg/L

Additional information

solibility in n-octanol