Scale (coating), copper

Endpoint summary

Additional information

The UVCB substance is an inorganic, complex metal containing material.

 

Intermediate B10 - Scale (coating), Copper   “Residue produced at high temperature by melting or treating at a high temperature metallic copper (metal, alloy, scrap). The intermediate consist mainly of copper metal and oxides from copper (I) or zinc. It may contain silicates. ”
EC names	Substance covered/synonym		EC number/ EINECS No.	CASNo.
Scale (coating), copper*	Copper Slag, from fabricators		273-744-9	69012-45-9
Waste solids, copper-refinery*			273-718-7	679012-18-6
Waste solids, copper-casting*			273-717-1	69012-17-5
Copper, dross*		Ball mill dust	305-408-5	94551-59-4
Scale (coating), mill, copper*			305-427-9	94551-81-2

 

At room temperature, the substance is a solid.

 

The majority of the available data on physical and chemical properties of the UVCB is taken from the report Liippo, et al, 2010 –a comprehensive study performed on the UVCB to characterize it (physico-chemical and mineralogical properties) in view of the upcoming REACH registrations of copper intermediates by the REACH Copper Consortium.

 

 In particular, a comprehensive chemical and mineralogical characterization of representative samples was performed (and reported under IUCLID 4.23). The study from Liippo et al (Outotec Lab) furthermore includes thermo gravimetric /differential scanning calorimetric (TG/DSC) measurements (under Air flux and Nitrogen atmosphere) that allowed determining melting, oxidation and related thermal stability properties of the UVCB.

The Outotec study included: Chemical assays (Inductively coupled argon plasma optic emission spectrometer, sulfur and carbon analyzes, Measurement of amount of magnetic material), Granulometry, density and specific surface measurements, determination of melting and oxidation temperatures (Thermogravimetry / differential scanning calorimetry), Water solubility tests, Mineralogical characterization (X-ray Diffraction, Optical Microscopy, Scanning Electron Microscopy) and Mineral Quantification. Based on the tests results, the study furthermore includes expert judgements addressing flammable, self-ignition, explosive and oxidising properties of the materials.

 

The selection and collection of the representative samples was made based on expert knowledge and according to standardized sampling protocols developed by the REACH Copper Consortium, an industry joint-venture regrouping major manufacturing and importing companies of the UVCB substance. Details on the sampling approach and the representative samples are reported as supporting information in IUCLID 1.4 and 4.1.

 

For a number of physic chemical properties, a range of values are provided to cover the variability among representative samples, if appropriate. The relevant physico-chemical properties of the materials (as well as IUCLID sections) are summarised below:

Table 1: Summary of the results

ECI Comments / Remarks	IUCLID Section	Scale, slag-type material from Cu melting furnace, primary smelter (representative, homogenised)	Scale, slag-type material from Cu rolling mill (representative, homogenised)	scale, dross-type (site 2, fines, homogenized)	scale, dross-type (site 2, particles, homogenized)	scale , dross-type (site 3)	scale, dross-type (site 3)
Lab code		09TT03840	09TT03897	10TT01448	10TT01449	10TT01565	10TT01635
State / Colour	4.1	Stable, Copper / Grey	Stable, Shiny reddish black	Stable, Greenish grey	Stable, Greenish grey	Stable, Shiny reddish black	Stable, Copper red black
Relative Density g/m3	4.4	4.71	5.57	n.d.	n.d.	n.d.	n.d.
Specific surface area	4.5	0.13	n.a.	n.a.	n.a.	n.a.	n.a.
Granulometry, D50, µm	4.5	>5000	29	n.d.	n.d.	n.d.	n.d.
Water solubility	4.8	poor (*)	poor (*)	n.d.	n.d.	n.d.	n.d.
Melting temperature,°C	4.2	n.d.	1066	n.d.	n.d.	n.d.	n.d.
Oxidation Temperature,°C	4.15	n.d.	280	n.d.	n.d.	n.d.	n.d.
Assays / Chemistry	4.23	See table	See table	See table	See table	See table	See table
Mineralogy	4.23	See table	See table	See table	See table	See table	See table
Flammability	4.13	No	No	No	No	No	No
Self-ignition	4.12	No	No	No	No	No	No
Explosive properties	4.14	No	No	No	No	No	No
Oxidizing properties	4.15	No	No	No	No	No	No
Relative Density, OECD 109; specific surface area, BET method; water solubility,OECD 105; melting and oxidation temperature TG/DSC analysis

(*) Poor in preliminary test, with exceptions at high loading and shaking over long period.