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Diss Factsheets

Physical & Chemical properties

Solubility in organic solvents / fat solubility

Administrative data

Endpoint:
solubility in organic solvents / fat solubility
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
2007
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

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2007
Report date:
2007

Materials and methods

Principles of method if other than guideline:
Determination of octanol solubility.
The analytical method for the determination is in agreement with the method that was agreed upon at the Analytical Experts Meeting of ETAD (Basel) on January 12, 2005.

Test material

Constituent 1
Chemical structure
Reference substance name:
3-hydroxy-4-[(2-methyl-4-nitrophenyl)azo]-N-(o-tolyl)naphthalene-2-carboxamide
EC Number:
229-102-5
EC Name:
3-hydroxy-4-[(2-methyl-4-nitrophenyl)azo]-N-(o-tolyl)naphthalene-2-carboxamide
Cas Number:
6410-32-8
Molecular formula:
C25H20N4O4
IUPAC Name:
3-hydroxy-4-[(2-methyl-4-nitrophenyl)diazenyl]-N-(2-methylphenyl)-2-naphthamide
Test material form:
solid: bulk
Details on test material:
Name of test material (as cited in study report): Pigment Red 12
Analytical purity: 96.3 % (w/w) (comp. 1)

Results and discussion

Solubility in organic solvents / fat solubility
Medium:
n-octanol
Solubility:
1.27 mg/L
Temp.:
23 °C
Remarks on result:
other: The determination of octanol solubility was conducted at ambient temperature (23-24 °C).
Details on results:
The value above represents the mean from 3 determinations (sigma=0.01). See below for indidividual results.

Any other information on results incl. tables

Individual results:

 

Absorption
(d = 10 cm)

mg/L

a1

0.09631

1.27

a2

0.09678

1.27

a3

0.09766

1.28


Applicant's summary and conclusion

Conclusions:
The test substance has an octanol solubility of 1.27 mg/L.
Executive summary:

The octanol solubility was determined by UV-Vis analysis of the dissolved test substance amount in 30 mL octanol according to the method that was agreed upon at the Analytical Experts Meeting of ETAD (Basel) on January 12, 2005. The test substance has an octanol solubility of 1.27 mg/L (23-24 °C).