3,3'-[(2,5-dichloro-p-phenylene)bis[imino(1-acetyl-2-oxoethylene)azo]]bis[4-chloro-N-(5-chloro-o-tolyl)benzamide]

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:

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

Test material information

Constituent 1

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)

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.