Registration Dossier
Registration Dossier
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EC number: 918-205-7 | CAS number: -
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:
- 2017-06-08 to 2017-08-14
- 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 103 (Boiling Point)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.2 (Boiling Temperature)
- Version / remarks:
- 30 May, 2008
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Key result
- Decomposition:
- yes
- Decomp. temp.:
- > 243 °C
- Conclusions:
- n-Butyltriphenylphosphonium bromide has no boiling point, it decomposes after melting.
Reference
Preliminary test:
Two steps were registered with maxima at 329°C resp. 495°C. A total mass loss of 99.4 % at the final temperature could be observed (mass change in the range until 370°C: 80.0 %; mass change in the range from 370 to 600°C: 19.4 %). No significant mass loss occurred due to purging.
After cooling the residue was brown-black on the inside of the crucible and also on its cover.
Main test:
The DSC measurements were performed twice in the temperature range from 20 - 350°C resp. from 20 - 450°C. A sharp endothermic peak indicating a melting point could be observed (peak maximum: 245°C/ 246°C; extrapolated onset temperature: 242.78°C/ 242.85°C; rounded mean of both determinations: 243°C). Upon further heating the DSC-curve showed no more sharp peaks but the typical fluctuating course indicating decomposition. Reweighing after the measurement showed that the sample had lost 39.3 %/61.6 % of its mass. After the first run the residue looked liquid and colourless with single black parts, after the second run the residue looked liquid and dark-brown discoloured.
Description of key information
no boiling point, substance decomposes before boiling
Key value for chemical safety assessment
Additional information
No boiling point detected. The boiling point of n-Butyltriphenylphosphonium bromide was determined according to OECD Guideline 103 (27 July 1995) and EU Method A.2 (30 May, 2008) using differential scanning calorimetry. A sharp endothermic peak indicating a melting point could be observed (243°C). Upon further heating the DSC-curve showed no more sharp peaks but the typical fluctuating course indicating decomposition.
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