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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
05 November 2014 - 07 June 2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP-compliant study in accordance with EC A.1, OECD 102 and EPA OPPTS 830.7200.

Data source

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

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
(2008)
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
(1995)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7200 (Melting Point / Melting Range)
Version / remarks:
(1998)
Deviations:
no
GLP compliance:
yes
Type of method:
thermal analysis
Remarks:
(differential scanning calorimetry)

Test material

Constituent 1
Chemical structure
Reference substance name:
Barium tartrate
EC Number:
227-615-9
EC Name:
Barium tartrate
Cas Number:
5908-81-6
Molecular formula:
C4H4O6Ba
IUPAC Name:
Barium L(+)-(2R,3R)-tartrate
Details on test material:
- Name of test material (as cited in study report): Barium tartrate
- Appearance: White powder

Results and discussion

Melting / freezing point
Decomposition:
yes
Decomp. temp.:
> 300 °C
Remarks on result:
other: No melting before decomposition started. Decomp. temp. in K: > 573

Any other information on results incl. tables

PRELIMINARY TEST WITH TGA

From 325°C upwards the weight of the sample decreased significantly. At 456°C the sample weight had decreased by 25%. After the experiment, a brown/black residue remained in the sample container. The change of the colour indicated reaction and/or decomposition of the test substance.

DSC EXPERIMENT

No effects were obtained which were due to melting of the test substance. The observed exothermic peaks (from 300°C onwards) were due to reaction and/or decomposition of the test substance based on the shape of the heat flow curve. After the experiment, a brown residue remained in the sample container.

Applicant's summary and conclusion

Conclusions:
In a GLP-compliant study in accordance with EC A.1, OECD 102 and EPA OPPTS 830.7200 using differential scanning calorimetry, melting was not observed before decomposition of the substance started at 300°C. It was therefore concluded that the substance has no melting temperature.