Registration Dossier
Registration Dossier
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EC number: 257-098-5 | CAS number: 51274-00-1 This substance is identified in the Colour Index by Colour Index Constitution Number, C.I. 77492.
Nanomaterial surface chemistry
Administrative data
- Endpoint:
- nanomaterial surface chemistry
- Type of information:
- other: Expert statement
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Basic data given, reliable source
Data source
Reference
- Reference Type:
- other company data
- Title:
- Unnamed
- Year:
- 2 021
Materials and methods
- Principles of method if other than guideline:
- Expert statement
Test material
- Reference substance name:
- Iron hydroxide oxide yellow
- EC Number:
- 257-098-5
- EC Name:
- Iron hydroxide oxide yellow
- Cas Number:
- 51274-00-1
- Molecular formula:
- Fe(OH)O
- IUPAC Name:
- Iron hydroxide oxide
- Test material form:
- solid: nanoform
- Details on test material:
- Not specified
Constituent 1
Results and discussion
Any other information on results incl. tables
the surface characteristics of the manufactured iron (hydr)oxides are identical to naturally occurring iron (hydr)oxides: The surface oxide groups are protonated according to the pk-values of the respective groups, leading to reported isoelectric points of zero charge. Typically, they can be found in the near neutral region of the pH range 4 - 9. Other surface reactions are not known to take place under physiologically and environmentally relevant conditions.
Applicant's summary and conclusion
- Conclusions:
- the surface characteristics of the manufactured iron (hydr)oxides are identical to naturally occurring iron (hydr)oxides: The surface oxide groups are protonated according to the pk-values of the respective groups, leading to reported isoelectric points of zero charge. Typically, they can be found in the near neutral region of the pH range 4 - 9. Other surface reactions are not known to take place under physiologically and environmentally relevant conditions.
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