Registration Dossier
Registration Dossier
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EC number: 915-037-6 | CAS number: -
Additional physico-chemical information
Administrative data
- Endpoint:
- other: surface composition
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Acceptable, well-documented study report which meets basic scientific principles
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 009
- Report date:
- 2009
Materials and methods
Test guideline
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Analysis was performed by using x‐ray photoelectron spectroscopy (XPS) with a monochromatic Al x‐ray source (150 W) on areas approximately sized 700 x 300 μm. Wide spectra were run to detect elements present in the outermost surface oxide (information depth of a few nanometer) at five different surface area locations. Detailed high resolution spectra (20 eV pass energy) were acquired for the main compositional elements of each test item.
- GLP compliance:
- yes
Test material
- Reference substance name:
- Reaction mass of calcium disilicide and calcium silicide
- IUPAC Name:
- Reaction mass of calcium disilicide and calcium silicide
- Reference substance name:
- Reaction mass of calcium disilicide and calcium silicide
- EC Number:
- 915-037-6
- Molecular formula:
- CaSi; CaSi2; Ca2Si
- IUPAC Name:
- Reaction mass of calcium disilicide and calcium silicide
- Details on test material:
- - Test material identity in study report: ferrosilicocalcium alloy (CaSi) (EINECS n° 234-587-1, CAS n° 12013-55-7; EINECS n° 234-588-7, CAS n° 12013-56-8; EINECS n° --- --- -, CAS n° 12737-18-7). Test material identity given here (EINECS n° 915-037-6) includes these materials.
- Composition of test material, percentage of components: Si 61% (w/w), Ca 30% (w/w)
Constituent 1
Constituent 2
Results and discussion
- Results:
- The surface of CaSi is composed of silicon, calcium, iron and aluminium rich oxide phases. The thicness of the surface oxide layer is only few nanometers.
Applicant's summary and conclusion
- Conclusions:
- A thin nanometer thick surface oxide layer composed of silicon, calcium, iron and aluminium rich oxide phases is present on the surface of CaSi.
- Executive summary:
Surface composition analysis of CaSi was performed by using x‐ray photoelectron spectroscopy (XPS). The surface of CaSi is composed of silicon, calcium, iron and aluminium rich oxide phases. The thickness of the surface oxide layer is only few nanometres.
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