Registration Dossier
Registration Dossier
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EC number: 263-778-2 | CAS number: 62973-79-9
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:
- 31 Aug 2017 - 31 Aug 2017
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Principle
Melting point is determined by the use of differential scanning calorimetry (DSC) in which the difference in the amount of heat required to increase the temperature of a sample and reference is measured as a function of temperature.
Method
- Fill a DSC pan with ± 1 to 5mg sample and record the sample weight
- Close the DSC sample pan with a pan cover using a pan press
- Place the sample pan into the sample position of the DSC
- Prepare an empty reference pan and place it into the reference position of the DSC
- Start the analysis
Method Log:
1: Sampling interval 0.20 sec/pt
2: Equilibrate at 40.00°C
3: Isothermal for 2.00 min
4: Ramp 5.00°C/min to 350.00°C
5: End of method
Apparatus
- DSC from TA Instruments, Model: Q100 , S/N: 0100-0090
- Analytical balance with reading accuracy of at least ±0.1mg from Mettler Toledo, Model XP205, S/N: 1128210741
- Nitrogen cylinder from Air Liquide (N28 quality) - GLP compliance:
- no
- Type of method:
- differential scanning calorimetry
- Specific details on test material used for the study:
- Product code: 280PE
Product batch / lot: 170903 - Key result
- Melting / freezing pt.:
- > 350 °C
- Atm. press.:
- ca. 1 atm
- Decomposition:
- no
- Decomp. temp.:
- > 350 °C
- Sublimation:
- no
- Remarks on result:
- other:
- Remarks:
- Pressure not stated therefore entered as standard atmospheric pressure. No melting point or other phase transitions are observed before 350°C. The test item shows exothermal decomposition starting around 180°C.
- Conclusions:
- No melting point or other phase transitions are observed before 350°C. The test item shows exothermal decomposition starting around 180°C.
Reference
Description of key information
Melting point of C.I. Pigment Violet 1:2 was determined by the use of differential scanning calorimetry (DSC). No melting point or other phase transitions are observed before 350°C. The test item shows exothermal decomposition starting around 180°C.
Key value for chemical safety assessment
- Melting / freezing point at 101 325 Pa:
- 350 °C
Additional information
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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.
