Registration Dossier

Administrative data

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2010-04-16 to 2010-09-22
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP guideline study reliable without restrictions.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2010
Report date:
2010

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Remarks:
signed, 2009-10-29
Type of method:
thermal analysis
Remarks:
differential scanning calorimetry (DSC)

Test material

Constituent 1
Chemical structure
Reference substance name:
Titanium oxide sulphate
EC Number:
237-523-0
EC Name:
Titanium oxide sulphate
Cas Number:
13825-74-6
Molecular formula:
O5STi
IUPAC Name:
titanium oxide sulphate
Constituent 2
Reference substance name:
123334-00-9
Cas Number:
123334-00-9
IUPAC Name:
123334-00-9
Details on test material:
- Name of test material (as cited in study report): Titanium(IV)oxysulfate – sulphuric acid hydrate
- Molecular formula (if other than submission substance): TiOSO4 * xH2SO4 * xH2O
- Substance type: White solid
- Storage condition of test material: Ambient temperature, dry, tightly closed

No further information was stated.

Results and discussion

Melting / freezing point
Melting / freezing pt.:
> 500 °C
Atm. press.:
ca. 1 024 hPa

Any other information on results incl. tables

Individual Results

Thermal Stability (DSC):

A DSC-measurement in a closed glass crucible showed a multistep endothermic effect in the temperature range of 190 – 330 °C. No further effects were observed up to the maximum temperature (350 °C).

 

Melting Point / Melting Range (DSC)

Due to a possible reaction of the test item (test item contains sulphuric acid) with aluminium crucibles the measurements were performed in open glass crucibles. The measurements in open glass crucibles showed an endothermic effect in the temperature range 60 to 380 °C:

Ident-No.

Onset / °C

Temperature range / °C

Crucible

30486

115.88

60 to 320 °C

Open glass

30487

118.56

60 to 380 °C

Open glass

 

An optical inspection of the test item after the measurement showed that the test item was caked but not molten. An additional measurement with the capillary method was performed in order to clarify the results of the DSC measurements:

 

No.

Set point

Heating rate

End point

Melting point

Remarks

 

1

 

 

50 °C

 

 

10 K/min

 

 

400 °C

 

 

 

200 °C: discolouration at the surface of the test item to greyish

 

400 °C: discolouration of the test item to yellowish

 

After cooling the colour of the test item returns to white and the test item is caked

 

Thus it was concluded, that the test item does not melt within the tested temperature range of 25 – 500 °C.

Boiling Point / Boiling Range (DSC):

As no melting was observed, no boiling point could be quoted.

Applicant's summary and conclusion

Conclusions:
The test item shows no melting or boiling in the temperature range of 25 – 500 °C.
Executive summary:

The melting point of test item itanium(IV)oxysulfate – sulphuric acid hydrate (molecular formula TiOSO4 x H2SO4 x H2O; CAS No. 123334-00-9) was determined following the protocol as given by OECD Guideline 102. As result of the measurement the melting point is > 500 °C. Substance was caked and showed discoloration, but was not molten.