Registration Dossier
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EC number: 285-749-3 | CAS number: 85136-25-0
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:
- 2018
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- GLP compliance:
- no
- Other quality assurance:
- other: ISO 9001-2008
- Type of method:
- differential scanning calorimetry
- Key result
- Remarks on result:
- not determinable
- Conclusions:
- The DSC record of the sample does not show any endothermic signal attributable to a change of state, like melting point is. The TGA analysis does not show independent loss on weight processes (but a constant loss along the thermogram) it is not possible to unequivocally assign every thermal phenomenon to a decomposition process.
- Executive summary:
A DSC has been done and the sample has shown a first wide endothermic phenomenon starting at 59ºC with an associated heat of 129.7 J/g and a second exothermic phenomenon from 237ºC with an associated heat of 435.4 J/g. Next, a third exothermic phenomenon is observed starting at 382ºC with an associated heat higher than 3079.3 J/g.
The same sample has been analysed by TGA showing a first weight loss of 8.7% from 36ºC to 235ºC, a second weight loss of 5.1% from 235ºC to 308ºC and a third weight loss of 28.1% from 308ºC to 600ºC.
Since the TGA analysis does not show independent loss on weight processes (but a constant loss along the thermogram) it is not possible to unequivocally assign every thermal phenomenon to a decomposition process.
- Endpoint:
- melting point/freezing point
- Type of information:
- (Q)SAR
- Adequacy of study:
- supporting study
- Study period:
- 2018
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- results derived from a valid (Q)SAR model and falling into its applicability domain, with adequate and reliable documentation / justification
- Qualifier:
- no guideline required
- Principles of method if other than guideline:
- Calculation of the melting point by EPIWEB
- Type of method:
- other: calculation
- Key result
- Melting / freezing pt.:
- 349.84 °C
- Atm. press.:
- 1 atm
- Conclusions:
- The calculated melting point of Direct Blue 281is predicted to be ca 350°C
Referenceopen allclose all
Description of key information
The DSC record of the sample does not show any endothermic signal attributable to a change of state, like melting point is.The TGA analysis does not show independent loss on weight processes (but a constant loss along the thermogram) it is not possible to unequivocally assign every thermal phenomenon to a decomposition process.
The melting point indicated in the key value for chemical safety assessment has been estimated by Epiwin.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 349.84 °C
Additional information
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