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Administrative data

Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2015
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:
2015
Report date:
2015

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:
Hydrogen [1-[(2-hydroxy-4-nitrophenyl)azo]-2-naphtholato(2-)][1-[(2-hydroxy-5-nitrophenyl)azo]-2-naphtholato(2-)]chromate(1-) , compound with 3-[(2-ethylhexyl)oxy]propylamine (1:1)
EC Number:
276-857-1
EC Name:
Hydrogen [1-[(2-hydroxy-4-nitrophenyl)azo]-2-naphtholato(2-)][1-[(2-hydroxy-5-nitrophenyl)azo]-2-naphtholato(2-)]chromate(1-) , compound with 3-[(2-ethylhexyl)oxy]propylamine (1:1)
Cas Number:
72812-34-1
Molecular formula:
C32H18CrN6O8.C11H25NO.H
IUPAC Name:
Chromate(1-), [1-[2-[2-(hydroxy-kO)-4-nitrophenyl]diazenyl-kN1]-2-naphthalenolato(2-)-kO][1-[2-[2-(hydroxy-kO)-5-nitrophenyl]diazenyl-kN1]-2-naphthalenolato(2-)-kO]-, hydrogen, compd. with 3-[(2-ethylhexyl)oxy]-1-propanamine (1:1:1)
Details on test material:
purity > 99,3%

Results and discussion

Water solubility
Water solubility:
57 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 0.01494 50
a2 0.01674 55
a3 0.02046 67
Average 57

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 57 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 57 µg/L.