Magnesium dihydrogen di-L-aspartate

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:

2019-06-17 to 2019-08-13

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

other: Recommendations on the TRANSPORT OF DANGEROUS GOODS: Manual of Tests and Criteria, 6"‘ 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

Qualifier:

according to guideline

Guideline:

other: VDI 2263 (1990), sheet 1, Grewer oven

Version / remarks:

1990

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Key result

Remarks on result:

no self ignition observed under the test conditions

In the investigation of self-ignition in the Grewer oven for the pure test item an endothermic process was detected starting at a temperature of approx. 110 °C. Starting at a temperature of approx. 310 °C a small exothermic effect was observed that led to a maximum temperature of approx. 370 °C (corresponding oven temperature 360 °C). After the measurement a black residue remained in the wire basket. For the test item in mixture with Kieselguhr an endothermic process was detected starting at a temperature of approx. 110 °C. Starting at a temperature of approx. 270 °C a small exothermic effect was observed that led to a maximum temperature of approx. 370 °C (corresponding oven temperature 365 °C). After the measurement a grey residue remained in the wire basket.

The pure test item Magnesium-(L)-hydrogen aspartate 2-hydrate indicated a slight self- heating at atmospheric pressure starting at a temperature of approx. 310 °C that led to a maximum temperature of approx. 370 °C (corresponding oven temperature 360 °C).

Conclusions:

On the basis to the results of the tests on the self-ignition in the Grewer oven the test item is classified as follows:
UN Transport Regulation: The test item does not have to be classified as self-heating substance in class 4, division 4.2 according to the UN Transport Regulation.
GHS I CLP Regulation EC 1272/2008 Annex 1: 2.11: The test item does not have to be classified as self-heating substance according to GHS/CLP Regulation EC 1272/2008 Annex 1: 2.11, respectively.

Executive summary:

The Auto flammability of magnesium dihydrogen di-L-aspartate was determined in a Grewer oven accoding to VDI 2263 sheet 1. The test item was filled in a small wire basket of a volume of 8 cm³ and this wire-basket was placed into the oven. In this oven, the self-ignition behavior of five samples can be determined simultaneously. An additional basket was filled with a reference material (graphite). The self-ignition behavior of the pure test item was indicated as a deviation between sample temperature and reference temperature. Very often, the test item melts before a self-ignition takes place. In this case, the sample flows out of the basket and no self-ignition can occur. Thus, the self-ignition behavior of the sample blended with 50 wt.-% Kieselguhr was investigated in a third wire basket simultaneously. Kieselguhr has a high specific surface area and prevents the test item from flowing out of the baskets.

an endothermic process was detected starting at a temperature of approx. 110 °C. Starting at a temperature of approx. 310 °C a small exothermic effect was observed that led to a maximum temperature of approx. 370 °C (corresponding oven temperature 360 °C). After the measurement a black residue remained in the wire basket. For the test item in mixture with Kieselguhr an endothermic process was detected starting at a temperature of approx. 110 °C. Starting at a temperature of approx. 270 °C a small exothermic effect was observed that led to a maximum temperature of approx. 370 °C (corresponding oven temperature 365 °C). After the measurement a grey residue remained in the wire basket.

Only marginal self heating of the test item was observed at the highest applied temperature, thus, the test item does not need to be classified as self-heating substance in class 4, division 4.2 according to the UN Transport Regulation and the test item does not have to be classified as self-heating substance according to GHS/CLP Regulation EC 1272/2008 Annex 1: 2.11

Description of key information

In a test conducted according to UN Recommendations on the TRANSPORT OF DANGEROUS GOODS: Manual of Tests and Criteria, Rev. 6 (2015) and UN-Model Regulations, Rev. 20 (2017) VDI 2263 Sheet 1 Grewer oven (1990), the test item was not classified as self-heating.

Additional information

In a test conducted according to UN Recommendations on the TRANSPORT OF DANGEROUS GOODS: Manual of Tests and Criteria, Rev. 6 (2015) and UN-Model Regulations, Rev. 20 (2017) VDI 2263 Sheet 1 Grewer oven (1990), the test item was not classified as self-heating.