Registration Dossier

Administrative data

Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2015
Report Date:
2015

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
EU Method A.6 (Water Solubility)
Version / remarks:
Commission Regulation (EC) No 440/2008 of 30 May 2008
Deviations:
yes
Remarks:
The standard EC A6 / OECD 105 methodology was not applicable to this test item, due to its very high solubility.
GLP compliance:
yes (incl. certificate)
Type of method:
flask method

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid
Specific details on test material used for the study:
Identification: Tungstosilicic-acid
CAS Numbers: 12027-38-2 & 12027-43-9*
Appearance / Physical State: White crystalline solid
Batch: MKBR8664V
Purity: ≥99.9%
Expiry Date: 11 February 2016
Storage Conditions: Room temperature, in the dark, over silica gel

Results and discussion

Water solubility
Water solubility:
> 75.1 other: %w/w
Conc. based on:
test mat.
Temp.:
20 °C
pH:
ca. 0
Remarks on result:
other: pH shown was of saturated solution
Details on results:
A solution of 1.5588g of substance dissolved completely in 0.517g water; a clear, colorless, highly mobile liquid, free from excess, undissolved
test item resulted. A solution of 1.919g of substance did not dissolve completely in 0.1169g water; a clear, colorless, highly mobile liquid, with crystals of excess test item on the bottom and sides of the vessel resulted.

Any other information on results incl. tables

 Solution concentration

pH

 5%  1.4
 25%  0.7
 50%  0.4
 75%  0

Applicant's summary and conclusion

Conclusions:
The substance can be considered effectively completely water miscible.