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Administrative data

Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Study period:
16 July – 03 October, 1996
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: done under GLP and OECD method

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1996
Report date:
1997

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
other: OJEC L383 A/54-62
Qualifier:
according to guideline
Guideline:
OECD Guideline 105 (Water Solubility)
Version / remarks:
Paris 1981
GLP compliance:
yes
Type of method:
flask method

Test material

Constituent 1
Chemical structure
Reference substance name:
-
EC Number:
424-660-8
EC Name:
-
Cas Number:
224631-15-6
Molecular formula:
Hill formula: C18H26N4O5S CAS formula: C18H26N4O5S
IUPAC Name:
(S)-2,5-dioxopyrrolidin-1-yl 2-(3-((2-isopropylthiazol-4-yl)methyl)-3-methylureido)-3-methylbutanoate

Results and discussion

Water solubility
Remarks on result:
other: In water, A-133816.0 hydrolyses nearly completely such that its aqueous solubility could not be determined.
Details on results:
In water, A-133816.0 hydrolyses nearly completely to 2,4 wing acid (A-87681.0) such that its aqueous solubility could not be determined.

Applicant's summary and conclusion

Conclusions:
Interpretation of results (migrated information): other: Hydrolyes almost completely
In water, A-133816.0 hydrolyses nearly completely such that its aqueous solubility could not be determined.
Executive summary:

During the shake flask testing it was noted - on visual
inspection of the test samples - that the excess material
added to ensure saturation of the samples appeared to have
dissolved.  Analysis of the test samples for A-133816
demonstrated that no test material was present in the
solutions. The samples were also analyed for 2,4-Wing Acid,
a known hydrolysis product of A-133816.  Quantification of
the 2,4-Wing Acid accounted for most of the theoretical
quantity of A-133816 having undergone hydrolysis (ca96%
hydrolysis).

96% of substance hydrolyzes. The water solubility is not
detectable due to the substance completely dissolved.

Also tested for its hydrolysis product 2,4-Wing Acid