Registration Dossier
Registration Dossier
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EC number: 254-751-6 | CAS number: 40018-26-6
Boiling point
Administrative data
- Endpoint:
- boiling point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2004-07-02 to 2004-11-25
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 005
- Report date:
- 2005
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 103 (Boiling Point/Boiling Range)
- Version / remarks:
- The determination was carried out by differential scanning calorimetry (DSC) using the procedure specified in ASTM E537-86, Method 103 of the OECD Guidelines for Testing of Chemicals, 27 July 1995.
The calculation was performed using an adaptation of the Stein and Brown Method (MPBP for Windows version 1.41, © 2000 U.S. Environmental Protection Agency). - Deviations:
- not specified
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
Test material
- Reference substance name:
- 1,4-dithiane-2,5-diol
- EC Number:
- 254-751-6
- EC Name:
- 1,4-dithiane-2,5-diol
- Cas Number:
- 40018-26-6
- Molecular formula:
- C4H8O2S2
- IUPAC Name:
- 1,4-dithiane-2,5-diol
- Test material form:
- solid: particulate/powder
Constituent 1
Results and discussion
Boiling point
- Key result
- Atm. press.:
- 101.17 kPa
- Decomposition:
- yes
- Remarks:
- decomposed over the range of approximately 441 to 483K.
- Decomp. temp.:
- >= 441 - <= 483 K
- Remarks on result:
- other:
- Remarks:
- As the test material decomposed, no value for the boiling temperature could be determined experimentally. However, using an adaptation of the Stein and Brown method (MPBP for Windows version 1.41, © 2000 U.S. Environmental Protection Agency), the boiling temperature was calculated to be 285°C (558 K).
Any other information on results incl. tables
Similar thermographic profiles were obtained using air and nitrogen atmospheres; this indicates that the observed decomposition in both determinations is probably thermal and not oxidative.
The decomposition observed in the thermograms was confirmed by a visual estimation, using a modified Siwoloboff apparatus. After melting, the test material began to gradually darken in colour (from a clear liquid to a dark brown gel, then finally a black solid) over the range of 163 to 218°C.
Applicant's summary and conclusion
- Conclusions:
- The test material has been determined to decompose from approximately 441 to 483 K (167.7 to 207.1 °C) at 101.17 kPa. As the test material decomposed, no value for boiling temperature could be determined. A calculated value of boiling temperature gave a result of 558 K (285 °C).
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