Registration Dossier
Registration Dossier
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EC number: 271-829-5 | CAS number: 68609-44-9
Melting point / freezing point
Administrative data
- Endpoint:
- melting point/freezing point
- 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:
- 2 017
- Report date:
- 2017
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- GLP compliance:
- yes
- Type of method:
- differential scanning calorimetry
Test material
- Reference substance name:
- Gadolinium oxide sulfide (Gd2O2S), ytterbium-doped
- EC Number:
- 271-829-5
- EC Name:
- Gadolinium oxide sulfide (Gd2O2S), ytterbium-doped
- Cas Number:
- 68609-44-9
- Molecular formula:
- (Gd1.7, Yb0.3)O2S
- IUPAC Name:
- Gadolinium oxide sulfide, ytterbium-doped
- Test material form:
- solid: particulate/powder
Constituent 1
Results and discussion
Melting / freezing point
- Key result
- Melting / freezing pt.:
- > 400 °C
- Atm. press.:
- ca. 1 atm
- Decomposition:
- yes
- Decomp. temp.:
- ca. 549 °C
- Remarks on result:
- other: melting not observed. Sample weight had decreased by 0.2% at 549 °C
Any other information on results incl. tables
Preliminary test: Grey residue remained. Originally off-white, the change of colour indicating reaction and/or decomposition of the test item.
Main study: After the experiment the sample appeared unchanged.
Applicant's summary and conclusion
- Conclusions:
- The substance has a melting point above 400 °C.
- Executive summary:
A preliminary test (thermogravimetric analysis) was conducted on the substance at a heating rate of 20 °C/minute from 25 °C to 549 °C. No significant weight loss was observed. At 549°C, the sample weight had decreased by 0.20%. After the experiment, a grey residue remained in the sample container (original colour: off-white). The change of the colour indicated reaction and/or decomposition of the test item. The main differential scanning calorimetery study was conducted at rate intervals of 20 °C/minute for a range of 25 to 400 °C. No effects were observed < 400°C due to melting and boiling of the test item. After the experiment the sample appeared to have been unchanged, i.e. no decomposition and/or evaporation were observed.
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