Registration Dossier
Registration Dossier
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EC number: 231-767-1 | CAS number: 7722-88-5
Particle size distribution (Granulometry)
Administrative data
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with national standard methods
- Remarks:
- .
Data source
Reference
- Reference Type:
- other company data
- Title:
- Unnamed
- Year:
- 2 009
- Report date:
- 2010
Materials and methods
Test guideline
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- The determination of particle size was made by a screening process with a specific mesh size in an air jet made by subpressure.
- GLP compliance:
- no
- Type of method:
- sieving
- Type of distribution:
- volumetric distribution
Test material
- Reference substance name:
- Tetrasodium pyrophosphate
- EC Number:
- 231-767-1
- EC Name:
- Tetrasodium pyrophosphate
- Cas Number:
- 7722-88-5
- Molecular formula:
- H4O7P2.4Na
- IUPAC Name:
- tetrasodium (phosphonatooxy)phosphonate
- Details on test material:
- - Name of test material (as cited in study report): tetrasodium pyrophosphate
Constituent 1
Results and discussion
Particle size
- Percentile:
- D50
- Remarks on result:
- other: Migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.
Particle size distribution at different passages
- No.:
- #1
- Size:
- < 45 µm
- Distribution:
- > 90 %
Applicant's summary and conclusion
- Conclusions:
- Particle size distribution indicates substance is an inhalation risk (a significant proportion of the particles are present at < 100 µm). This study is considered to be scientifically justified for use as a key study.
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