Registration Dossier
Registration Dossier
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EC number: 939-893-5 | CAS number: 27970-79-2
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:
- other: GLP guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 016
- Report date:
- 2016
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- thermal analysis
Test material
- Reference substance name:
- 1-hydroxy-2-methylpentan-3-one
- EC Number:
- 939-893-5
- Cas Number:
- 27970-79-2
- Molecular formula:
- C6 H12 O2
- IUPAC Name:
- 1-hydroxy-2-methylpentan-3-one
- Test material form:
- other: liquid
- Details on test material:
- Name of test material (as cited in study report): 1-Hydroxy-2-Methyl-3-Pentanone
Analytical purity: The purity determined by GC-FID on a DB-5 capillary column is 90.6 area-% as a mean value of two injections of the test item,
corrected to the water content.
Impurities (identity and concentrations): 0.3 g/100g water
Lot/batch No.: J 1812
Storage condition of test material: Room temperature, protection against light and humidity
Constituent 1
Results and discussion
Melting / freezing point
- Melting / freezing pt.:
- -29 °C
- Atm. press.:
- 1 013.25 hPa
Any other information on results incl. tables
Results in detail
Melting temperature
The melting temperature of the test item was found at -29 °C peak temperature in the 1st heating (determination A and B).
Determination |
Onset temperature [°C] |
Peak temperature [°C] |
A |
approx.. -50 |
-28.8 |
B |
approx.. -50 |
-28.8 |
Mean value |
approx.. -50 |
-29 |
The estimated accuracy is ± 1 °C.
Observed thermic processes
The melting peak showed a flat base on the low temperature side, starting at about -50 °C, which comes from impurities.
The test item showed a glass transition below -100 °C at all deter-minations, followed by a recrystallization at about -65 °C peak tem-perature (determination A and B).
In order to survey the thermic behavior of the test item a preliminary TG/DSC-Test (non-GLP) was run up to 600 °C.
An endothermic peak starting at about room temperature with a total weight loss at 200 °C showed the vaporization of the test item.
Applicant's summary and conclusion
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