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EC number: 238-101-9 | CAS number: 14233-37-5
Melting point / freezing point
Administrative data
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- From 11 OCTOBER 2018 to 6 NOVEMBER 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 018
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
Test material
- Reference substance name:
- 1,4-bis(isopropylamino)anthraquinone
- EC Number:
- 238-101-9
- EC Name:
- 1,4-bis(isopropylamino)anthraquinone
- Cas Number:
- 14233-37-5
- Molecular formula:
- C20H22N2O2
- IUPAC Name:
- 1,4-bis[(propan-2-yl)amino]-9,10-dihydroanthracene-9,10-dione
- Test material form:
- solid: particulate/powder
Constituent 1
Results and discussion
Melting / freezing point
- Key result
- Melting / freezing pt.:
- >= 152.04 - <= 181.94 °C
- Decomposition:
- no
- Decomp. temp.:
- ca. 260.53 °C
- Sublimation:
- no
Applicant's summary and conclusion
- Conclusions:
- The melting point and melting point should have been determined via DSC (differential
scanning calorimetry).
Three DSC measurements were performed. In all measurements two endothermic peaks
which came directly after each other and one exothermic behaviour were detected.
The test item consists of two function groups (isopropylamino and antraquinone), the two
endothermic peaks could be the melting process of the test item. The melting point will be
given in a range with two peak maxima. The beginning and the end of the process were
evaluated with the event marker.
Based on observations of the pre-tests also the appearance of the test item in the crucible
after DSC measurement the exothermic behaviour should be identified as decomposition.
The beginning of the decomposition was evaluated with the event marker function with
260.53 °C (533.68 K).
Melting point:
The melting point is given in a range from: 152.04 °C to 181.94 °C (425.19 K to 455.09 K)
with
the first peak maximum of 170.31 °C (443.46 K) and
the second peak maximum of 176.77 °C (449.92 K)
These values represent the three independent determinations.
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