Slimes and Sludges, copper electrolytic

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

Cross-reference

Reason / purpose for cross-reference:

reference to other study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2010

Materials and methods

Test guideline

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

GLP compliance:

no

Remarks:

other quality assurance

Type of method:

thermal analysis

Test material

Test material information

Constituent 1

Reference substance name:

Slimes and Sludges, copper electrolytic

EC Number:

266-972-5

EC Name:

Slimes and Sludges, copper electrolytic

Cas Number:

67711-95-9

Molecular formula:

Not applicable

IUPAC Name:

slimes and sludges, copper electrolytic

Details on test material:

Test material was dried before sending to test labs. Sampling of representative samples was made according to Sampling protocol of the REACH Copper Consortium (iuclid 1.4 attachment).
B6 anodic slime from primary smelter (site 1a, not decopperized) (representative, dried, homogenized) lab code: 09TT03746
B6 anodic slime from primary smelter (site 1b, decopperized) (representative, dried, homogenized) lab code: 09TT03745
B6 anodic slime, site 2A lab code: 09TT06661
B6 anodic slime, site 2B lab code: 09TT06662

Results and discussion

Melting / freezing point

Melting / freezing pt.:

ca. 71 - ca. 126 °C

Any other information on results incl. tables

The melting and oxidation tests were done for the anode slime samples 09TT03745, 09TT03746, 09TT06661 and 09TT06662.The TG/DSC curves of these tests are presented in Appendixes A - D of th study report

During the melting tests of the anode slime (09TT03745) sample was heated in Al₂O₃crucible using nitrogen atmosphere. The endothermic peaks in the curve are at the temperature ranges 126 – 200 °C, 324 – 360 °C, 780 – 857 °C and 942 – 946 °C. The mass of the sample starts to decrease at the temperature range 126 – 200 °C and decreases step by step. These phenomena indicate, that some components of the sample start to decompose and melt in the crystal water already at the temperature range 126 - 200 °C. 

During the melting tests of the anode slime (09TT03746) sample was heated in Al₂O₃crucible using nitrogen atmosphere. The endothermic peaks in the curve are at the temperature range 71 – 106 °C and 944 – 951 °C. The mass of the sample decreases all the time step by step. These phenomena indicate, that some components of the sample decompose and evaporate.

During the melting tests of the anode slime (09TT06661) sample was heated in Al₂O₃crucible using nitrogen atmosphere. The endothermic peaks in the curve are at the temperature range 120 – 132 °C, 1177 – 1183 °C and 1295 – 1302 °C. The mass of the sample starts to decrease ~120 °C. These phenomena indicate that some components of the sample decompose and evaporate.

During the melting tests of the anode slime (09TT06662) sample was heated in Al₂O₃crucible using nitrogen atmosphere. The endothermic peaks in the curve are at the temperature range 88 – 141 °C and 1300 – 1398 °C. The mass of the sample starts to decrease ~100 °C. These phenomena indicate that some components of the sample decompose and evaporate.