2,4-dihydro-5-methyl-2-phenyl-4-(phenylazo)-3H-pyrazol-3-one

Solubility in organic solvents / fat solubility

Administrative data

Endpoint:

solubility in organic solvents / fat solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2008

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: well performed study according to guideline developed and agreed upon by the ETAD in january 2005 for colorants with very low solubility

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2008

Report date:

2008

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

other: method developed by ETAD

GLP compliance:

no

Test material

Test material information

Constituent 1

Reference substance name:

2,4-dihydro-5-methyl-2-phenyl-4-(phenylazo)-3H-pyrazol-3-one

EC Number:

224-330-1

Cas Number:

4314-14-1

Molecular formula:

C16H14N4O

IUPAC Name:

2,4-dihydro-5-methyl-2-phenyl-4-(phenylazo)-3H-pyrazol-3-one

Results and discussion

Solubility in organic solvents / fat solubility

Medium:

n-octanol

Solubility:

1 340 mg/L

Temp.:

23 °C

Test substance stable:

yes

Details on results:

The determination was repeated three times and the average value was caöculated from the individual results.
Individual results:
Absorption Solubility
(d = 1 cm n-octanol
dilution 1:250) mg/l
a1 0.4635 1320
a2 0.4584 1310
a3 0.4829 1380

Average: 1340 mg/L

Applicant's summary and conclusion

Conclusions:

The solubility of the substance in n-octanol at 23°C is 1340 mg/L

Executive summary:

The n-octanol solubility of the substance was determined 3 times according to the method developed by the ETAD at 23°C. The average of the results was 1340 mg/L.