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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:
2021
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

Constituent 1
Chemical structure
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

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.