Registration Dossier

Administrative data

Endpoint:
flash point of flammable liquids
Data waiving:
study technically not feasible
Justification for data waiving:
the study does not need to be conducted because the flash point is only relevant to liquids and low melting point solids
Cross-referenceopen allclose all
Reason / purpose:
data waiving: supporting information
Reference
Endpoint:
appearance / physical state / colour
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Reason / purpose:
reference to other study
Qualifier:
no guideline followed
Principles of method if other than guideline:
Appearance was determined by visual observation.
GLP compliance:
yes (incl. certificate)
Physical state at 20°C and 1013 hPa:
solid
Key result
Form:
solid: particulate/powder
Colour:
pink
Odour:
other: not determined
Substance type:
organic
Conclusions:
C.I. Pigment Red 81:2 is a pink powder.
Executive summary:

The substance was observed (at room temperature) to be a medium to fine pink powder with clusters.

Reason / purpose:
data waiving: supporting information
Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
01 March 2017 - 05 May 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
2008
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
1995
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.7200 (Melting Point / Melting Range)
Version / remarks:
1998
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
differential scanning calorimetry
Key result
Decomposition:
yes
Decomp. temp.:
175 °C
Remarks on result:
other: the substance has no melting point

TGA EXPERIMENT (PRELIMINARY TEST)

Significant decrease of weight from 275°C upwards. At 549°C the sample weight had decreased by 16%.

After the experiment, a black charred residue remained in the sample container (original colour: pink). The change of the colour indicated reaction and/or decomposition of the test item.

DSC EXPERIMENT

DSC curve: see Figure 1 in the attached study report.

The DSC-curve obtained showed an exothermic peak between 25°C and 150°C. Based on the weight loss observed in the TGA experiment it was assumed that this effect was most likely due to evaporation of solvent impurities. From 175°C several effects were observed which are related to reaction and/or decomposition of the test item. After the experiment, a black charred residue remained in the sample container.

Conclusions:
Melting of the test item was not observed below the temperature at which reaction and/or decomposition started (i.e. at 175°C). The substance has no melting temperature.
Executive summary:

Differential Scanning Calorimetry (DSC) experiments were performed in a GLP study according to EC A.1, OECD 102 and OPPTS 830.7200. The substance has no melting temperature. During heating from 25°C to 400°C reaction and/or decomposition of the substance started at 175°C. Melting of the test item was not observed below the temperature at which reaction and/or decomposition started.

Data source

Materials and methods

Results and discussion

Applicant's summary and conclusion