Registration Dossier
Registration Dossier
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EC number: 231-826-1 | CAS number: 7757-93-9
Particle size distribution (Granulometry)
Administrative data
Link to relevant study record(s)
- Endpoint:
- particle size distribution (granulometry)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- No data.
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Conducted according to suitable methodology and acceptable for assessment. This study is considered to be scientifically justified for use as a key study.
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- Laser particle sizer Malvern with unit dry Scirocco 2000.
- GLP compliance:
- not specified
- Type of method:
- other: Laser particle sizer Malvern with unit dry Scirocco 2000.
- Type of distribution:
- counted distribution
- Percentile:
- D50
- Remarks on result:
- other: Migrated from fields under 'Mass median diameter' as D50 percentile. No source field for Standard deviation.
- No.:
- #1
- Size:
- < 100 µm
- Distribution:
- ca. 100 %
- Conclusions:
- The particle size determination of calcium hydrogenorthophosphate shows that ca. 100% of particles were < 100µm in diameter. This indicates substance is an inhalation risk (a significant proportion of the particles are present at < 100 µm).
This study is conducted according to an appropriate method and is therefore considered to be acceptable and to adequately satisfy the regulatory requirement as a key study for this endpoint.
Reference
No data.
Description of key information
One key study exists.
Additional information
The particle size determination of calcium hydrogenorthophosphate shows that ca. 100% of particles were < 100µm in diameter. This indicates substance is an inhalation risk (a significant proportion of the particles are present at < 100 µm).
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