Registration Dossier

Physical & Chemical properties

Water solubility

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Administrative data

Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Justification for type of information:
Water solubility measured as part of EC Physico/Chemical Test A5, Surface Tension (Ring Method).

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2017
Report Date:
2017

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
other: EU Regulation (EC) 440/2008, Annex Part A test A5 and OECD Test Guideline 115
GLP compliance:
yes
Type of method:
other: EU Regulation (EC) 440/2008, Annex Part A test A5 and OECD Test Guideline 115

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid
Remarks:
Resinous solid. Becomes flowable above 60 oC.
Specific details on test material used for the study:
Batch no. EXP 5

Results and discussion

Water solubility
Key result
Water solubility:
< 1 mg/L
Conc. based on:
test mat.
Incubation duration:
ca. 2 h
Temp.:
20 °C
pH:
ca. 7
Details on results:
A solution of 1g/L was made up, the test sample floated at the top of the solution. It was then sonicated for 2 hours and the solution turned a pale yellow with some of the sample still floating at the top of the solution. A second solution of 1mg/L was made up; the sample remained floating on the surface of the solution. Therefore testing does not need to be conducted.

Applicant's summary and conclusion

Conclusions:
Testing for surface tension revealed that the solubility of hop extract, beta acids, potassium salt in water is less than 1 mg per litre. This is entirely as expected - the UVCB substance contains hydrophobic substances.