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Physical & Chemical properties

Auto flammability

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Administrative data

Endpoint:
auto-flammability
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: No GLP but other quality assurance
Cross-reference
Reason / purpose:
reference to same study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2010

Materials and methods

Test guideline
Guideline:
other: 5.2.1. Thermogravimetry / differential scanning calorimetry
Principles of method if other than guideline:
The oxidation and melting temperatures are measured using TG/DSC (thermogravimetry/ differential scanning calorimetry) method. This measurement is congruent with 92/69/EEC (A.1, 1.4.4.1 and 1.4.4.2).
The thermogravimetrical (TGA) measurements are determined with the STA 409C, manufactured by Netzsch in 1998 and with the TGA/DSC1, manufactured by Mettler Toledo in 2009. Both analyzers provide also a possibility of differential scanning calorimetry (DSC). Thermogravimetry measures the weight changes that occur when a sample is heated, cooled or held at constant temperature in a defined gas atmosphere using a controlled temperature program. Differential scanning calorimetry is based on the well-proven Boersma or heat flux principle in which the heat flux of a sample and a reference sample are compared. That enables to see endothermic or exothermic reaction in the sample, which occur when sample for example melts, vaporizes or when a chemical reaction occurs in the sample. TGA and DSC measurements are done simultaneously and the temperature range in both equipments is from room temperature to 1600 C. Sample type can be liquid, solid or colloid. The accuracy of temperature is 0.5% within 0.3% reproducibility. The resolution of the balance is 1.0 g /11/. The thermogravimetrical measurements are done both in nitrogen (N2) and air flow into the sample chamber heating the sample up to 1500 °C using heating rate 5 °C/min.
GLP compliance:
no
Remarks:
Other quality assurance

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
Copper powder sample AK 0.1 to 0.2 µm, D50= 135 µm; oxygen : 0.3, C <0.01%

Results and discussion

Relative self-ignition temperature (solids)
Remarks on result:
no self ignition observed under the test conditions

Any other information on results incl. tables

During the melting test, the copper powder sample was heated in Al2O3crucible using nitrogen atmosphere. The TG/DSC curves of the tests are available. The first endothermic peak appears at 1059oC. Based on TG/DSC, and mineral composition the studied material has no self-ignition properties.

Applicant's summary and conclusion

Conclusions:
This study is of good quality and demonstrates that the absence of self-ignition
Executive summary:

During the melting test, the copper powder sample was heated in Al2O3crucible using nitrogen atmosphere. The TG/DSC curves of the tests are available. Thefirst endothermic peak appears at 1059oC. Based on TG/DSC, and mineral composition the studied material has no self-ignition properties.