Dilanthanum tricarbonate

Stability: thermal, sunlight, metals

Link to relevant study record(s)

Reference

Endpoint:

thermal stability

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

other: EU Method A.14

GLP compliance:

no

Test substance thermally stable:

yes

Safety pre-test

After reachinga temperature of 520 °C and cooling down the weight of the crucible was recorded with

Test run	Crucible weight [mg]	Crucible appearance
1^st	622.64	gold sealing of the crucible was grey and bunged outwards
2^nd	611.72	gold sealing of the crucible was grey
3^rd	626.59	the gold sealing of the crucible was grey
4^th	629.90	gold sealing of the crucible was grey-reddish

 

Calibration

After calibration with indium and zinc the measurement of indium yielded the following values:

Expected Melting point	Measured Melting point	Expected Heat flow	Measured Heat flow	Assessment
156.6 ± 1.0°C	156.38 °C (onset)	28.45 ± 1.0 J/g	28.93 J/g	OK

The measurement of indium after calibration met the validity criteria.

DSC Screening of the Test substance

1^sttest: No exothermic event was detected until 500°C.

2^ndtest: No exothermic event was detected until 500°C. Only a small endothermic event at 287.58 °C and a sharp increasing baseline at 511.52 with a peak maximum of 513.30 °C were detected.

3^rdtest: No exothermic event was detected until 500°C.

4^thtest: No exothermic event was detected until 500°C. Only a small endothermic event at 403.23 °C was detected.

Observations

DSC run	Mass test item	Mass crucible (before measurement):	Mass crucible (after measurement):	Observations
First	3.80 mg	627.26 mg	627.23 mg	After the test, the outside gold sealing slightly bulged outwards. Then, the crucible was opened and the test item was visually unchanged.
2^nd	5.05 mg	635.92 mg	635.27 mg	After the test, the outside gold sealing bulged outwards. Then, the crucible was opened and the test item was visually unchanged.
3rd	3.97 mg	617.84 mg	617.75 mg	After the test, the outside gold sealing bulged outwards. Then, the crucible was opened and the test item was visually unchanged.
4^th	1.68 mg	628.00 mg	627.99 mg	After the test, the outside gold sealing slightly bulged outwards. Then, the crucible was opened and the test item was visually unchanged.

Final Results

A screening testvia DSC (differential scanning calorimetry) was conducted from 0°C to 520 °C. During the DSC run no exothermic event was observed.

Therefore, the test substance is no subject to the classification procedures for self-reactive substances and the acceptance procedures for Class 1 explosives need not to be applied

according to the “UNRecommendations on the Transport of Dangerous Goods; Manual of Tests and Criteria”; sixth revised edition, 2015, Section 20.2.1, 20.3.3.3 and Appendix 6, section 3.3.c.

 

The measurement of indium after calibration met the validity criteria. Therefore, the result of the study is considered valid.

 

Overall conclusion

Referring to the DSC (differential scanning calorimetry) measurements the test substance Lanthancarbonate is not subject to the classification procedures for self-reactive substances and the acceptance procedures for Class 1 explosives need not to be applied

according to the “UNRecommendations on the Transport of Dangerous Goods; Manual of Tests and Criteria”; sixth revised edition, 2015, Section 20.2.1, 20.3.3.3 and Appendix 6, section 3.3.c.

Description of key information

Substance is thermally stable (DSC, EU Method A.14)

Additional information

A screening testvia DSC (differential scanning calorimetry) was conducted from 0°C to 520 °C.
During the DSC run no exothermic event was observed.

Therefore, the test substance is no subject to the classification procedures for self-reactive substances and the acceptance procedures for Class 1 explosives need not to be applied.

according to the “UNRecommendations on the Transport of Dangerous Goods; Manual of Tests and Criteria”; sixth revised edition, 2015, Section 20.2.1, 20.3.3.3 and Appendix 6, section 3.3.c.