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EC number: 274-625-4 | CAS number: 70495-37-3
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2019-04-01 to 2019-04-02
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Version / remarks:
- 1995
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Version / remarks:
- 2008
- 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
- Key result
- Decomposition:
- yes
- Decomp. temp.:
- >= 180 °C
- Remarks on result:
- not determinable
- Remarks:
- The test item has no melting point up to its decomposition
- Conclusions:
- The test item ammonium 2-ethylhexyl sulfate has no melting point up to its decomposition as determined by differential scanning calorimetry and confirmed by the capillary method according to Regulation EC No. 440/2008 Method A.1. and OECD Test Guideline 102 (1995).
- Executive summary:
A melting point of ammonium 2 -ethylhexyl was determined according to OECD guideline 102, Eu method A.1 and OPPTS 830.7200 using differential scanning calorimetry (DSC) and the cappilary method. The test item has no melting point up to its decomposition as determined by differential scanning calorimetry and confirmed by the capillary method
Reference
Results
A first endothermic effect was observed starting at a temperature of 180 °C. A second endothermic effect was detected starting at a temperature of 230 °C. No further thermal effects were observed up to the test end temperature of 500 °C.
Table 1: Results of the DSC-measurements
No. |
Sample weight / mg |
Onset of Effect / °C |
Range of effect / °C |
Weight loss / mg |
Atmospheric pressure / hPa |
PN17549 |
11.01 |
-- |
180 – 260 (endo) |
10.74 |
997.6 |
PN17550 |
9.02 |
-- |
190 – 220 (endo) |
8.72 |
997.0 |
The capillary method was performed in order
to identify and confirm the melting or boiling temperature of the test
item. While subject to a heating rate in a capillary, the test item
started to foam at a temperature of 140 °C. At 170 °C the test item
started to liquify, but continued to produce foam simultaneously until a
temperature of 215 °C. Starting at a temperature of 265 °C the test item
turned brown. At 400 °C the test was terminated and the test item was
black.
Combining the DSC measurements and the capillary method, neither melting
nor boiling can be assigned to the endothermic effects observed in the
DSC measurement.
Description of key information
The test item Ammonium 2-ethylhexyl sulfate has no melting point up to its decomposition as determined by differential scanning calorimetry and confirmed by the capillary method according to Regulation EC No. 440/2008 Method A.1. and OECD Test Guideline 102 (1995).
Key value for chemical safety assessment
Additional information
A melting point of ammonium 2 -ethylhexyl was determined according to OECD guideline 102, Eu method A.1 and OPPTS 830.7200 using differential scanning calorimetry (DSC) and the cappilary method. The test item has no melting point up to its decomposition as determined by differential scanning calorimetry and confirmed by the capillary method
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