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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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
Study period:
2014
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

Constituent 1
Chemical structure
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
Details on test material:
purity > 99,7%

Results and discussion

Water solubility
Water solubility:
8 µg/L
Temp.:
23 °C
pH:
ca. 7
Details on results:
Three measurements were performed with the method described above
Individual results:
Absorption Water Sol
(d = 10 cm) μg/l
a1 0.00679 7
a2 0.00767 8
a3 0.00814 9
Average 8

Applicant's summary and conclusion

Conclusions:
Interpretation of results (migrated information): insoluble (< 0.1 mg/L)
The water solubility ot the substance was determined as 8 µg/L at 23°C.
Executive summary:

The water 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 8 µg/L.