Registration Dossier
Registration Dossier
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EC number: 807-413-2 | CAS number: 70280-68-1
Boiling point
Administrative data
- Endpoint:
- boiling point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 02 March 2015-19 June 2015
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP-compliant study in accordance with EC A.2, OECD 103 and EPA OPPTS 830.7220.
Cross-reference
- Reason / purpose for cross-reference:
- reference to same study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 015
- Report date:
- 2015
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.2 (Boiling Temperature)
- Version / remarks:
- (2008)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 103 (Boiling point/boiling range)
- Version / remarks:
- (1995)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7220 (Boiling Point / Boiling Range)
- Version / remarks:
- (1996)
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- differential scanning calorimetry
Test material
- Reference substance name:
- 3-[3-(1,1,1,3,5,5,5-heptamethyltrisiloxan-3-yl)propoxy]propane-1,2-diol
- EC Number:
- 807-413-2
- Cas Number:
- 70280-68-1
- Molecular formula:
- C13H34O5Si3
- IUPAC Name:
- 3-[3-(1,1,1,3,5,5,5-heptamethyltrisiloxan-3-yl)propoxy]propane-1,2-diol
- Test material form:
- other: liquid
- Details on test material:
- - Name (as cited in study report): X-22-1927
- Appearance: clear light yellow liquid
- Storage conditions: at room temperature
Constituent 1
Results and discussion
Boiling point
- Decomposition:
- yes
- Decomp. temp.:
- 200 °C
- Remarks on result:
- other: No boiling point. Decomp. temp. 473 K.
Any other information on results incl. tables
TGA EXPERIMENT
From 225°C upwards the weight of the sample decreased significantly. At 299°C, the sample weight had decreased by 25%.
DSC EXPERIMENTS
In each of the DSC curves an endothermic peak between 200°C and 375°C was observed with an extrapolated onset temperature of 282.41°C (Experiment 1), 291.58°C (Experiment 2), 274.35°C (Experiment 3) or 297.60°C (Experiment 4).
The endothermic peak in Experiment 2 (closed sample container), shifted to a higher temperature compared to Experiment 1 (and Experiment 3) which indicated boiling. However the higher extrapolated onset temperature measured in Experiment 4 demonstrated that reaction and/or decomposition of the test substance was the reason for the endothermic effect.
After each experiment it was observed that the test substance was evaporated from the sample container.
Applicant's summary and conclusion
- Conclusions:
- In a GLP-compliant study in accordance with EC A.2, OECD 103 and EPA OPPTS 830.7220 using differential scanning calorimetry, decomposition started at 200°C before boiling was reached. It was therefore concluded that X-22-1927 has no boiling temperature.
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