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EC number: 201-946-9 | CAS number: 89-86-1
Boiling point
Administrative data
- Endpoint:
- boiling point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 27.02.2018 - 05.04.2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 018
- Report date:
- 2018
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.2 (Boiling Temperature)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 103 (Boiling Point)
- Version / remarks:
- 1995
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- differential scanning calorimetry
Test material
- Reference substance name:
- 2,4-dihydroxybenzoic acid
- EC Number:
- 201-946-9
- EC Name:
- 2,4-dihydroxybenzoic acid
- Cas Number:
- 89-86-1
- Molecular formula:
- C7H6O4
- IUPAC Name:
- 2,4-dihydroxybenzoic acid
- Test material form:
- solid
Constituent 1
Results and discussion
Boiling point
- Key result
- Decomposition:
- yes
- Decomp. temp.:
- >= 290 °C
Any other information on results incl. tables
Results
The test item shows an endothermic effect in the temperature range of 190 – 330 °C, which can be associated with a melting of the test item (melting point according to the certificate of analysis 213 °C) accompanied by decomposition. No further thermal effects could be observed up to the maximum test temperature of 500 °C.
Table1: Results of the DSC-measurements
No. |
Sample weight / mg |
Onset of Effect / °C |
Range of effect / °C |
Weight loss / mg |
Atmospheric pressure / hPa |
Remark |
PN15045 |
9.01 |
220.78 |
190 – 330 (endo) |
7.88 |
1019.0 |
|
PN15050 |
10.65 |
220.90 |
220 – 350 (endo) |
9.24 |
1019.0 |
Due to the fact that the test item showed no second endothermic effect before its decomposition starting at a temperature of approx. 290 °C, the test item has no boiling before its decomposition start at a temperature of 290 °C.
Applicant's summary and conclusion
- Conclusions:
- 2,4-Dihydroxybenzoic acid has no boiling point. Decomposition starts at approx. 290°C.
- Executive summary:
The test item 2,4-Dihydroxybenzoic acid has no boiling point up to its decomposition starting at approx. 290 °C as determined by differential scanning calorimetry and capillary method according to Regulation EC No.440/2008 Method A.2. and OECD Test Guideline 103 (1995).
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