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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Remarks:
test procedure similar to OECD 105
Cross-referenceopen allclose all
Reason / purpose for cross-reference:
reference to same study
Reference
Endpoint:
partition coefficient
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Remarks:
Procedure according to method of Analytical Expert Group ETAD (Ecological and Toxicological Association of Dyes and Organic Pigment Manufacturer); method similar to Annex V, A.8, 1.6.1, Directive 67/548/EEC
Reason / purpose for cross-reference:
reference to same study
Qualifier:
according to guideline
Guideline:
other: ETAD Analytical Expert Group
Version / remarks:
method for substances with very low solubilty in both, water and n-octanol
Principles of method if other than guideline:
Based on the determined solubilities in water and in n-octanol the partition coefficient was estimated (chapter 1.6.1, A.8). Instead of saturated solvent
systems pure solvents were used.
Type of method:
estimation method (solubility ratio)
Partition coefficient type:
octanol-water
Type:
log Pow
Partition coefficient:
1.06
Temp.:
24 °C
pH:
ca. 7
Type:
Pow
Partition coefficient:
11.48
Temp.:
24 °C
pH:
ca. 7

Solubility of C.I. Pigment Red 168 in n-octanol: 0.124 mg/l

Water solubility of C.I. Pigment Red 168 : 0.0108 mg/l

Pow PR 168 = 11.48

log Pow PR 168 = 1.06

Executive summary:

The log Pow of Pigment Red 168 is 1.06.

Reason / purpose for cross-reference:
reference to same study
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
Medium:
n-octanol
Solubility:
0.124 mg/L
Temp.:
24 °C
Test substance stable:
yes

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2005
Report date:
2005

Materials and methods

Test guideline
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 105 (Water Solubility)
Deviations:
yes
Remarks:
modified taking into account the very low solubility ot the test substance
Principles of method if other than guideline:
The method for the determination and analytical investigation is according to the method that was agreed upon at the "Analytical Experts Meeting" of ETAD (Basel) on January 12, 2005.
Type of method:
flask method

Test material

Constituent 1
Chemical structure
Reference substance name:
4,10-dibromodibenzo[def,mno]chrysene-6,12-dione
EC Number:
224-481-3
EC Name:
4,10-dibromodibenzo[def,mno]chrysene-6,12-dione
Cas Number:
4378-61-4
Molecular formula:
C22H8Br2O2
IUPAC Name:
4,10-dibromonaphtho[7,8,1,2,3-nopqr]tetraphene-6,12-dione
Test material form:
solid: nanoform

Results and discussion

Water solubility
Water solubility:
10.8 µg/L
Temp.:
24 °C
pH:
ca. 7

Any other information on results incl. tables

The solubility of the sample C.I. Pigment Red 168 in water at ambient temperature, determined under the conditions as mentioned above, is 10.8 µg/L (mean, n = 3, sigma = 2.4).

Table 1: Individual results

   Absorption (d = 10 cm)  µg/L
 a1 0.000525  8.2
 a2 0.001264  11.5
 a3 0.001572  12.8

Applicant's summary and conclusion

Conclusions:
the test substance is practically insoluble in water (< 0.1 mg/L)