Registration Dossier
Registration Dossier
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EC number: 215-168-2 | CAS number: 1309-37-1
Nanomaterial specific surface area
Administrative data
- Endpoint:
- nanomaterial specific surface area
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
Data source
Referenceopen allclose all
- Reference Type:
- publication
- Title:
- The Iron Oxides: Structure, Properties, Reactions, Occurrences and Uses: Structure, Properties, Reactions, Occurences and Uses
- Author:
- Schwertmann U, Cornell RM
- Year:
- 2 003
- Bibliographic source:
- Verlag: Wiley-VCH; Auflage: 2., vollst. überarb. u. erw. Aufl. (29. Juli 2003); Sprache: Englisch; ISBN-10: 3527302743; ISBN-13: 978-3527302741
- Reference Type:
- other company data
- Title:
- Unnamed
- Year:
- 2 015
Materials and methods
- Principles of method if other than guideline:
- BET measurements (Brunauer, Emmett und Teller)
XRD line broadening techniques
Test material
- Reference substance name:
- Diiron trioxide
- EC Number:
- 215-168-2
- EC Name:
- Diiron trioxide
- Cas Number:
- 1309-37-1
- Molecular formula:
- Fe2O3
- IUPAC Name:
- diiron(3+) trioxidandiide
- Test material form:
- solid: nanoform
- Details on test material:
- no details given;
Constituent 1
Results and discussion
Specific surface area
- Specific Surface Area:
- 151 m²/g
- Remarks on result:
- other: A maximum surface area of 151 m²/g is reported.
Any other information on results incl. tables
During dehydroxylation, the surface area of goethite [FeO(OH)] usually rises initially as the expulsion of water leads to the progressive formation of slit-shaped micropores and finally rapidly upon heating above 300 -350°C as the micropores are transformed into mesopores and sintering takes place. It is reported that a maximum in surface area of 151 m²/g was reached after heating a natural goethite sample for 2 hr at 300°C in vacuo. Similar abservations have been recorded for synthetic samples heated in air. The transformation to hematite at this stage is almost complete.
Applicant's summary and conclusion
- Conclusions:
- The specific surface area of iron oxide pigments differs in dependence of the grade. The range is between 2 m²/g and about 20 m²/g.
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