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EC number: 226-971-2 | CAS number: 5580-58-5
Nanomaterial dustiness
Administrative data
- Endpoint:
- nanomaterial dustiness
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 6.10.2021 - 2.12.2021
- Reliability:
- 1 (reliable without restriction)
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 021
- Report date:
- 2021
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- EN 15051-2 (Workplace exposure. Measurement of the dustiness of bulk materials - Rotating drum method)
- GLP compliance:
- not specified
- Type of method:
- other: rotating drum
- Details on methods and data evaluation:
- The sample has been divided in eight equal lots of about 35 ml using a rotary riffler, this rotary riffler is especially designed to minimize the loss of any fine dust. One of these divided lots has been used for determining the bulk density and the moisture content as well. The bulk density of the sample has been determined by accurately weighing a volume of 100 cm3 after gentle tapping at the side. This bulk density is used to convert the sample mass to the required volume of approx. 35 cm3 and the sample is further divided to the required 35 cm3. A few grams of the sample have been placed in the moisture analyser and have been heated to 105°C until a stable mass has been reached. The relative mass loss so-obtained has been quantified as moisture content as an independent triplicate.
One of the divided sub lots of about 35 cm3 is accurately weighed and placed in the rotating drum and the airborne dust particles are transferred by an air flow rate of 38 l min-1 to the filter assembly during 1 minute. The airborne dust released is drawn from the dust generation section, through the dust transfer section, into the special designed foam/filter assembly with successively 20 pores per inch foam, 80 pores per inch foam and a glass fibre backing filter. The complete procedure is repeated several times with fresh sample material and clean filters, each dustiness measurement is preceded by a blank run.
Test material
- Reference substance name:
- 3,3'-[(2,5-dichloro-p-phenylene)bis[imino(1-acetyl-2-oxoethylene)azo]]bis[4-chloro-N-(5-chloro-o-tolyl)benzamide]
- EC Number:
- 226-971-2
- EC Name:
- 3,3'-[(2,5-dichloro-p-phenylene)bis[imino(1-acetyl-2-oxoethylene)azo]]bis[4-chloro-N-(5-chloro-o-tolyl)benzamide]
- Cas Number:
- 5580-58-5
- Molecular formula:
- C42H32Cl6N8O6
- IUPAC Name:
- 3,3'-{(2,5-dichloro-1,4-phenylene)bis[imino(1,3-dioxobutane-2,1-diyl)diazene-2,1-diyl]}bis[4-chloro-N-(5-chloro-2-methylphenyl)benzamide]
- Test material form:
- solid: nanoform, no surface treatment
- Details on test material:
- Mass-specific surface area (BET): 41.9 m2/g
TEM (primary particle diameter): 85 nm (D50)
Constituent 1
Data gathering
- Instruments:
- The health related dustiness investigations have been performed using the 15051 rotating drum dustiness tester according to the European standard
Results and discussion
Dustiness index
- Key result
- Mean:
- 26 mg/kg
- Remarks on result:
- other: Respirable dustiness mass fraction
Applicant's summary and conclusion
- Conclusions:
- Pigment Yellow 94 has low dustiness potential for respirable fraction, with mass-based dustiness index 26 mg/kg.
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