Registration Dossier

Diss Factsheets

Administrative data

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: No GLP study but other quality assurance

Data source

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

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
GLP compliance:
no
Type of method:
thermal analysis

Test material

Constituent 1
Reference substance name:
Copper Matte
IUPAC Name:
Copper Matte
Details on test material:
Sample collection made according to ECI/REACH Copper Consortium Standards Protocols (see IUCLID section 1.4)
Sample description Sample Code Lab Code
B2 Matte, Flash furnace type (composite from grinded material) AC_B2_625559 09TT02788
B2 Matte, Electric furnace type (composite from grinded material) AC_B2_625208 09TT02787
B2 matte, blast furnace type (composite from grinded material) KGHM_B2 10TT00139
B2 matte, white matte-type (site 2C importer) (representative) El Teniente 09TT07029
B2 matte, white matte-type (site 2D importer) Codelco Norte 09TT07719

Results and discussion

Melting / freezing point
Decomposition:
yes
Decomp. temp.:
600 - 780 °C

Any other information on results incl. tables

During the melting tests of the four (4) matte samples were heated in Al2O3crucible using nitrogen atmosphere.

Based on the TG/DSC measurements, the decomposition of the matte samples09TT02787 and 09TT02788 start at 650oC and 780 °C while for the “white metal” samples 09TT07310 (09TT07029) and 09TT7719 the decomposition starts at 600oC and 700 °C.

09TT02787, matte

The endothermic peaks in the curve are at the temperature ranges 850 – 855 °C, 1097 – 1102 °C and 1144 – 1152 °C. These indicate melting, but also decomposition occurs, because the mass of the sample starts to decrease slowly at the temperature ~650 °C and strongly at the temperature ~850 °C.

09TT02788, matte

The endothermic peaks in the curve are at the temperature ranges 1072 – 1091 °C and 1149 – 1159 °C, which indicate melting, decomposition and evaporation. The mass of the sample starts to decrease at the temperature ~780 °C, which indicates slow decomposition or evaporation. 

09TT07310 (09TT07029), “white metal”

The endothermic peak in the curve is at the temperature range 1120 – 1127 °C. This peak indicates melting, but also decomposition and evaporation, because the mass of the sample starts to decrease at the temperature ~600 °C. 

09TT07719, “white metal”

The endothermic peaks in the curve are at the temperature ranges 90 – 99 °C, 1091 – 1099 °C and 1459 – 1470 °C. The first endothermic peak indicates that the sample has contained some moisture. The endothermic peaks indicate melting, but also decomposition and evaporation, because the mass of the sample starts to decrease at the temperature ~700 °C. 

Applicant's summary and conclusion

Executive summary:

Based on the TG/DSC measurements, the decomposition of the matte samples 09TT02787 and 09TT02788 start at 650oC and 780 °C while for the “white metal” samples 09TT07310 (09TT07029) and 09TT7719 the decomposition starts at 600oC and 700 °C.