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Physical & Chemical properties

Flammability

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Administrative data

Endpoint:
self-heating substances / mixtures
Type of information:
experimental study
Adequacy of study:
key study
Study period:
20 - 22 March 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2017
Report date:
2017

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
other: UN Recommendations on the TRANSPORT OF DANGEROUS GOODS: Manual of Tests and Criteria
Version / remarks:
Rev. 6 (2015)
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: VDI 2263 Sheet 1 Grewer Oven
Version / remarks:
1990
Deviations:
no
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Chemical structure
Reference substance name:
Disodium 2-oxoglutarate
EC Number:
206-167-8
EC Name:
Disodium 2-oxoglutarate
Cas Number:
305-72-6
Molecular formula:
C5H6O5.2Na
IUPAC Name:
disodium 2-oxopentanedioate
impurity 1
Chemical structure
Reference substance name:
Water
EC Number:
231-791-2
EC Name:
Water
Cas Number:
7732-18-5
Molecular formula:
H2O
IUPAC Name:
Oxidane
Test material form:
solid: crystalline
Remarks:
Crystalline powder
Details on test material:
Batch No: 14152300
Storage: 15 – 25 °C

Results and discussion

Self-heating substances / mixturesopen allclose all
Key result
Test procedure:
other: Grewer oven
Remarks:
pure test item
Max. temp. reached:
230
Result:
other: no significant temperature increase was observed starting at 200°C
Remarks on result:
other: on the basis of the results, the test item cannot be classified. Further tests are needed.
Key result
Test procedure:
other: Grewer oven
Remarks:
test item in mixture with Kieselgur
Max. temp. reached:
220
Result:
other: no significant temperature increase was observed starting at 200°C
Remarks on result:
other: on the basis of the results, the test item cannot be classified. Further tests are needed.

Any other information on results incl. tables

In the investigation of self-ignition in the Grewer Oven for the pure test item a small exothermic process was detected starting at 200 °C. This self-heating did not lead to a significant temperature increase (30 °C above the corresponding temperature of the reference material). A black residue remained in the wire basket after the test.

For the test item in mixture with Kieselguhr also a small exothermic effect was observed starting at 200 °C, which also did not lead to a significant temperature increase (20 °C above the corresponding temperature of the reference material).

Applicant's summary and conclusion

Interpretation of results:
study cannot be used for classification
Conclusions:
The pure test item Alpha-Ketoglutarate disodium salt (CAS no. 305-72-6) indicated a self-heating at atmospheric pressure starting at a temperature of 200 °C. This self-heating process did not lead to a significant temperature increase.
On the basis of the results of the tests on the self-ignition in the Grewer Oven according to the UN Recommendations on the TRANSPORT OF DANGEROUS GOODS: Manual of Tests and Criteria, Appendix 6 Division 4.2, a classification of the test item as self-heating substance cannot be excluded. Further tests have to be performed for the classification.
Executive summary:

The pure test item Alpha-Ketoglutarate disodium salt (CAS no. 305 -72 -6) indicated a self-heating at atmospheric pressure starting at a temperature of 200 °C. This self-heating process did not lead to a significant temperature increase.

On the basis of the results of the tests on the self-ignition in the Grewer Oven according to the UN Recommendations on the TRANSPORT OF DANGEROUS GOODS: Manual of Tests and Criteria, Appendix 6 Division 4.2, a classification of the test item as self-heating substance cannot be excluded. Further tests have to be performed for the classification.