Registration Dossier

Administrative data

Endpoint:
relative self-ignition temperature (solids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From 2018-02-07 to 2018-02-08
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Cross-reference
Reason / purpose:
reference to other study
Reference
Endpoint:
self-heating substances / mixtures
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From 2018-07-13 to 2018-07-19
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose:
reference to other study
Qualifier:
according to
Guideline:
UN Manual of Tests and Criteria: Test N.4 (Test method for self-heating substances)
Version / remarks:
2015
Deviations:
no
GLP compliance:
yes (incl. certificate)
Key result
Test procedure:
100 mm sample cube at 140°C
Induction time (h):
48
Result:
negative outcome (no effect observed)

140 °C, 100 mm cube sample:

The temperature in the centre of the sample did not exceed the oven temperature within a storage time of 48 hours.

Since the temperature increase is below the threshold of 60 °C within 24 hours the result of the test is negative.

Due to the negative result in the 100 mm cube sample at an oven temperature of 140 °C further tests do not have to be performed.

Interpretation of results:
not classified based on GHS criteria
Conclusions:
The Bowes-Cameron-Cage test in the 1 L wire basket at 140 °C showed no self-heating of the test item within 24 hours. Due to this result further tests were not necessary.
According to the results of the test on the self-heating in the Bowes-Cameron-Cage Test (UN-Test N.4) the test item is classified as follows:
UN Transport Regulation: The test item is not classified as self-heating substance in class 4, division 4.2 according to the UN Transport Regulation.
GHS / CLP Regulation EC 1272/2008 Annex 1: 2.11: The test item is not classified as self-heating substance according to GHS/CLP Regulation EC 1272/2008 Annex 1: 2.11, respectively.
Executive summary:

In the Grewer oven the test item showed a self-ignition temperature of 170 °C. Following this screening test an additional test has been performed to investigate the self-heating properties of the substance. This was done according to UN Test N.4 by Bowes-Cameron-Cage Test.

The Bowes-Cameron-Cage test in the 1 L wire basket at 140 °C showed no self-heating of the test item within 24 hours. Due to this result further tests were not necessary.

According to the results of the test on the self-heating in the Bowes-Cameron-Cage Test (UN-Test N.4) the test item is classified as follows:

UN Transport Regulation: The test item is not classified as self-heating substance in class 4, division 4.2 according to the UN Transport Regulation.

GHS / CLP Regulation EC 1272/2008 Annex 1: 2.11: The test item is not classified as self-heating substance according to GHS/CLP Regulation EC 1272/2008 Annex 1: 2.11, respectively.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018
Report Date:
2018

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
other: VDI 2263 (1990), sheet 1, Grewer Oven
Version / remarks:
1990
Deviations:
no
Qualifier:
according to
Guideline:
other: Recommendations on the TRANSPORT OF DANGEROUS GOODS: Manual of Tests and Criteria, 6th edition, New York and Geneva, 2015: Appendix 6 Screening Procedures, Division 4.2: Substances which may be liable to spontaneous combustion
Version / remarks:
2015
Deviations:
no
GLP compliance:
yes (incl. certificate)

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder

Results and discussion

Relative self-ignition temperature (solids)
Key result
Relative self-ignition temperature:
170 °C
Remarks on result:
other: Onset self- ignition

Any other information on results incl. tables

An exothermic effect was detected starting at 170 °C, which led to a maximum temperature of 600 °C. After the measurement a black residue remained in the basket. It can be concluded that in the screening test, the on-set temperature for self-ignition is 170°C.

For a Grewer oven, no classification is recommended if the on-set temperature for self-ignition is > 220 °C (which is 80 °K above the reference temperature of 140°C). Since the on-set temperature (170°C) was below this cut-off value, the substance should be considered as self-heating substance.

Applicant's summary and conclusion

Conclusions:
A screening test using a Grewer oven was performed. The on-set temperature of self-ignition started at 170 °C, which led to a maximum temperature of 600 °C.
Executive summary:

The objective of this study was the screen for the relative self-ignition temperature of the test item according to VDI 2263, sheet 1 and UN Class 4, Division 4.2. The test item was heated in a Grewer-oven.The on-set temperature for self-ignition was observed at 170 °C, which leaded to a maximum temperature of 600 °C. For a Grewer oven, no classification is recommended if the on-set temperature for self-heating is > 220 °C (which is 80 °K above the reference temperature of 140°C).

Since the on-set temperature (170°C) was below this cut-off value, further testing to conclude on the presence or absence of self-heating properties of the the substance were performed. Reference is made to the key study reported under endpoint 'Flammability'.