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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
01 March 2017 - 05 May 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018
Report date:
2018

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 (incl. QA statement)
Type of method:
differential scanning calorimetry

Test material

1
Chemical structure
Reference substance name:
Xanthylium, 3,6-bis(ethylamino)-9-[2-(methoxycarbonyl)phenyl]-2,7-dimethyl-, molybdatesilicate
EC Number:
278-270-6
EC Name:
Xanthylium, 3,6-bis(ethylamino)-9-[2-(methoxycarbonyl)phenyl]-2,7-dimethyl-, molybdatesilicate
Cas Number:
75627-12-2
Molecular formula:
C54H58N4O6.MoO4 + C54H58N4O6.SiO3
IUPAC Name:
3,6-bis(ethylamino)-9-[2-(methoxycarbonyl)phenyl]-2,7-dimethyl-10λ⁴-xanthen-10-ylium dioxomolybdenumbis(olate) silicate
Test material form:
solid: particulate/powder
Details on test material:
- Appearance: Pink powder
- Storage conditions: At room temperature

Results and discussion

Melting / freezing point
Key result
Decomposition:
yes
Decomp. temp.:
175 °C
Remarks on result:
other: the substance has no melting point

Any other information on results incl. tables

TGA EXPERIMENT (PRELIMINARY TEST)

Significant decrease of weight from 275°C upwards. At 549°C the sample weight had decreased by 16%.

After the experiment, a black charred residue remained in the sample container (original colour: pink). The change of the colour indicated reaction and/or decomposition of the test item.

DSC EXPERIMENT

DSC curve: see Figure 1 in the attached study report.

The DSC-curve obtained showed an exothermic peak between 25°C and 150°C. Based on the weight loss observed in the TGA experiment it was assumed that this effect was most likely due to evaporation of solvent impurities. From 175°C several effects were observed which are related to reaction and/or decomposition of the test item. After the experiment, a black charred residue remained in the sample container.

Applicant's summary and conclusion

Conclusions:
Melting of the test item was not observed below the temperature at which reaction and/or decomposition started (i.e. at 175°C). The substance has no melting temperature.
Executive summary:

Differential Scanning Calorimetry (DSC) experiments were performed in a GLP study according to EC A.1, OECD 102 and OPPTS 830.7200. The substance has no melting temperature. During heating from 25°C to 400°C reaction and/or decomposition of the substance started at 175°C. Melting of the test item was not observed below the temperature at which reaction and/or decomposition started.