Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 205-182-7 | CAS number: 135-19-3
Boiling point
Administrative data
Link to relevant study record(s)
- Endpoint:
- boiling point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 09.02.2018 - 03.04.2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.2 (Boiling Temperature)
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- differential scanning calorimetry
- Key result
- Decomposition:
- yes
- Decomp. temp.:
- >= 220 °C
- Conclusions:
- 2-Naphthol has no boiling point. Decomposition starts at approx. 220°C.
- Executive summary:
The test item 2-Naphthol has no boiling point up to its decomposition starting at approx. 220 °Cas determined by differential scanning calorimetry and capillary method according to Regulation EC No. 440/2008 Method A.2. and OECD Test Guideline 103 (1995).
Reference
Results
The test item shows an endothermic effect in the temperature range of 100 – 130 °C, which can be associated with a melting of the test item (melting point according to the certificate of analysis 120.6 °C). In the temperature range of 210 – 290 °C the test item shows an exothermic effect with a decomposition energy of approx. 570 J/g. A second exothermic effect was observed in the temperature range of 320 – 360 °C (DSC run 14653) and of 370 – 400 °C (DSC run 14654) with a decomposition energy of about 30 J/g.
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 |
PN14653 |
8.03 |
120.90 --- --- |
100 – 130 (endo) 240 – 290 (exo) 320 – 360 (exo) |
5.92 |
1003.1 |
|
PN14654 |
8.83 |
120.65 --- |
100 – 130 (endo) 210 – 290 (exo) 370 – 400 (exo) |
6.60 |
1003.1 |
Due to the fact that the test item showed no second endothermic effect before its decomposition starting at a temperature of approx. 220 °C, the test item has no boiling before its decomposition start at a temperature of 220 °C.
Description of key information
A differential scanning calorimetry and capillary method was performed in accordance with OECD Testing Guideline 103 to determine the boiling point of the test substance 2-Naphthol. It concluded that 2-naphthol has no boiling point up to its decomposition which started at approx 220 oC.
Key value for chemical safety assessment
Additional information
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
