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relative self-ignition temperature (solids)
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
Reason / purpose for cross-reference:
data waiving: supporting information
self-heating substances / mixtures
Type of information:
experimental study
Adequacy of study:
key study
Study period:
01 March 2017 - 05 May 2017
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
according to guideline
UN Manual of Tests and Criteria: Test N.4 (Test method for self-heating substances)
Version / remarks:
Rev. 6 (2015)
GLP compliance:
yes (incl. QA statement)
Specific details on test material used for the study:
decomposition temp.: 175°C
Key result
Test procedure:
100 mm sample cube at 140°C
negative outcome (no effect observed)

An exothermic effect of the test item by self-heating was observed at an oven temperature of 142°C. During this effect the test item reached a temperature of 152°C. According to the guideline, the test is positive when the sample temperature exceeds the oven temperature by 60°C during the 24 hour testing time. Based on this, the result is considered negative and it demonstrated that the test item is “not a self-heating substance”.

After the experiment, the test item had turned into a darker pink residue. The change of colour might be due to decomposition/reaction.


Interpretation of results:
other: not classified based on GHS or CLP criteria
The substance is not self-heating.

Executive summary:

In a GLP study according to UN Test N.4, a negative result was obtained using a 10 cm sample cube at 140°C. From this it was concluded that C.I. Pigment Red 81:2 is not a self-heating substance.

Data source

Materials and methods

Results and discussion

Applicant's summary and conclusion

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