Registration Dossier
Registration Dossier
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EC number: 266-967-8 | CAS number: 67711-91-5 Product of smelting roaster calcines concentrates or cement copper with flux in reverberatory or electric furnaces. Composed primarily of copper and copper, iron and lead sulfides with minor sulfides of other metals.
Melting point / freezing point
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:
- 2 010
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
- 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
Constituent 1
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.
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