Reaction mass of copper oxide and manganese dioxide

Auto flammability

Link to relevant study record(s)

Reference

Endpoint:

relative self-ignition temperature (solids)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Experimental phase: 2017-01-26 to 2017-01-27

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

other: Guideline VDI 2263, sheet 1 (Grewer-oven)

Deviations:

no

Qualifier:

according to guideline

Guideline:

other: UN Recommendations on the Transport of Dangerous Goods, sixth revised edition, 2015, Appendix 6

Principles of method if other than guideline:

For the determination of the self-ignition temperature of the test item, the screening test according to Grewer (VDI 2263, sheet 1) was performed: In a 8 cm³ wire mesh basket the test item is heated in an oven with a constant rate in a stream of hot air. Heating is continued up to a temperature of 400°C. Concurrently, the temperature of the sample is monitored, and the self-ignition temperature is the temperature at which the temperature rise rate of the test item exceeds the temperature rise rate of the reference (graphite) due to an exothermal effect.

GLP compliance:

yes (incl. QA statement)

Specific details on test material used for the study:

The test item was tested as received. No further preliminary treatment such as drying or milling was performed.

Key result

Relative self-ignition temperature:

> 420 °C

Remarks on result:

other: The test item showed no exothermal or endothermal effect from ambient temperature to the maximum temperature of the measurement (approximately 420 °C).

4.8 g of the test item were placed into the wire-basket.

The test item showed no exothermal or endothermal effect from ambient temperature to the maximum temperature of the measurement (approximately 420 °C). After the test the test item appeared unchanged and showed a mass loss of approximately 7 % (this mass loss could have been caused by a reaction (e.g. transformation) of one of the metal oxides).

As no exothermal reaction was observed no further testing was necessary.

Conclusions:

Relative self-ignition temperature (solids): >420°C (Grever-oven test)

Executive summary:

In a study performed compliant to GLP according to guideline VDI 2263, sheet 1 (Grewer-oven), the relative self-ignition temperature (solids) for the test item was determined to be above 420°C.

According to the UN Recommendations on the Transport of Dangerous Goods (Manual of Tests and Criteria rev. 6) and to the GHS Regulations and Regulation (EC) 1272/2008 (CLP), the classification procedure for self-heating substances need not to be applied if the results of a screening test can be adequately correlated with the classification test and an appropriate safety margin is applied. Accordingly, the onset temperature in the Grewer-oven has to be > 220 °C for an exclusion of the test item from class 4.2 “self-heating substances” (chapter 2.11.4.2. GHS (CLP)). This is applies to the result for the test item (>420 °C).

In conclusion, the submission substance is not to be classified for class "self-heating substances".

Description of key information

Relative self-ignition temperature (solids): >420°C (Grever-oven test; RL1; 2017);

The key value is given as 420°C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

420 °C

Additional information

In a study performed compliant to GLP according to guideline VDI 2263, sheet 1 (Grewer-oven), the relative self-ignition temperature (solids) for the test item was determined to be above 420°C.

According to the UN Recommendations on the Transport of Dangerous Goods (Manual of Tests and Criteria rev. 6) and to the GHS Regulations and Regulation (EC) 1272/2008 (CLP), the classification procedure for self-heating substances need not to be applied if the results of a screening test can be adequately correlated with the classification test and an appropriate safety margin is applied. Accordingly, the onset temperature in the Grewer-oven has to be > 220 °C for an exclusion of the test item from class 4.2 “self-heating substances” (chapter 2.11.4.2. GHS (CLP)). This is applies to the result for the test item (>420 °C).

In conclusion, the submission substance is not to be classified for class "self-heating substances".