Registration Dossier
Registration Dossier
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EC number: 936-414-1 | CAS number: -
Nanomaterial dustiness
Administrative data
- Endpoint:
- nanomaterial dustiness
- Remarks:
- 4.23 to 4.28.8 key, BMS, IGF, 2008, dustiness, rel 2
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2008
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 008
- Report date:
- 2008
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- DIN 33897-2 Workplace atmospheres - Determination of the dustiness of bulk materials - Part 2: Continuous Drop
- Version / remarks:
- Version of the guideline is not specified.
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EN 15051 (Workplace atmospheres - Measurement of the dustiness of bulk materials - Requirements and reference test methods)
- Version / remarks:
- Method B - Version of the guideline is not specified.
- Deviations:
- not specified
- Principles of method if other than guideline:
- - Principle of test:
The dustiness was determined according to DIN 33897-2 and according to EN 15051, method B „ continuous drop". This process simulates dust generation processes where there are continuous falling operations (conveying, discharging, falling, refilling, weighing, sacking, metering, loading and unloading etc.) and where dust is liberated by winnowing during falling and where whirling takes place on impact.
- Short description of test conditions:
Temperature: 21,5 °C,51 % relative hurnidity.
Blank number concentration: 800 particles/cm3 (CPC)
Number concentration during experiments: 1050 particles/cm3 (SMPS)
Number concentration outside the measurement device („room concentration"): about 45 000 particles/cm3 (SMPS)
- Parameters analysed / observed: Dustiness was estimated in the inhalable and in the respirable fraction with CPC and SMPS. Mass-based and number metrics were used. - GLP compliance:
- no
- Type of method:
- continuous drop
- Details on methods and data evaluation:
- - Dropped mass: 120 g
- Duration of measurements: 10 min - Sampling:
- Baytubes C 150 P powder sample was provided by Bayer Material Science
Test material
- Reference substance name:
- carbon
- EC Number:
- 936-414-1
- Molecular formula:
- C
- IUPAC Name:
- carbon
- Details on test material:
- Test material is meeting the form as described in section 4.5 of the IUCLID dossier.
Constituent 1
- Specific details on test material used for the study:
- Test material is meeting the form as described in section 4.5 of the IUCLID dossier.
Results and discussion
Dustiness indexopen allclose all
- Mean:
- 1.5 mg/kg
- Remarks on result:
- other: Respirable SA
- Remarks:
- DIN33987
- Key result
- Mean:
- 39.75 mg/kg
- Remarks on result:
- other: Respirable WR (SAx26.5)
- Remarks:
- EN15051Meth.B
- Mean:
- 136.83 mg/kg
- Remarks on result:
- other: Inhalable SE
- Remarks:
- DIN33987-2
- Key result
- Mean:
- 3 626 mg/kg
- Remarks on result:
- other: Inhalable WI (SEx26.5)
- Remarks:
- EN15051Meth.B
Any other information on results incl. tables
According to the dustiness categories of standard EN 15051-B:
| Test material | WR (respirable dust) | WI (Inhalable dust) |
| DP Baytubes | low | moderate |
Ultrafine particles:
Number concentration during experiments (SMPS): 1050 particles/cm3
Applicant's summary and conclusion
- Conclusions:
- The dustiness was determined according to DIN 33897-2 and according to EN 15051, method B „ continuous drop". This process simulates dust generation processes where there are continuous falling operations (conveying, discharging, falling, refilling, weighing, sacking, metering, loading and unloading etc.) and where dust is liberated by winnowing during falling and where whirling takes place on impact.
- Executive summary:
In relation to the total air flow the sample shows dustiness mass fractions WR of 39.75 mg/kg drop mass and dustiness mass fractions W1of 3626 mg/kg drop mass. This results in a classification of low for respirable dust and of moderate for inhalable dust according to EN15051-B. In relation to the pariflow (according to DIN 33897-2) the sample shows dustiness mass fractions SA of 1.50 mg/kg drop mass and dustiness mass fraction SE of 136.83 mg/kg drop mass.
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