N,N'-naphthalene-1,5-diylbis[4-[(2,3-dichlorophenyl)azo]-3-hydroxynaphthalene-2-carboxamide]

PBT assessment

PBT assessment: overall result

Reference

Reference 1

Name:

Pigment Brown 41

Type of composition:

legal entity composition of the substance

State / form:

solid: nanoform

Related composition:

Pigment Brown 41

Reference substance:

Pigment Brown 41

Type of information reported:

single nanoform

Name of nanoform:

C.I. Pigment Brown 41 - joint submission

Shape category:

spheroidal

Remarks:

multimodal shapes containing about 50% spheroidal particles and about 50% elongated particles

Shape:

cubic

Pure shape:

no

Typical composition:

ca. 45 %

Range:

> 19 - < 60 %

Shape category:

spheroidal

Remarks:

multimodal shapes containing about 50% spheroidal particles and about 50% elongated particles

Shape:

spherical

Pure shape:

no

Typical composition:

ca. 5 %

Range:

> 1 - < 10 %

Shape category:

elongated

Remarks:

multimodal shapes containing about 50% spheroidal particles and about 50% elongated particles

Shape:

rod

Pure shape:

no

Typical composition:

ca. 50 %

Range:

> 30 - < 80 %

Shape category:

spheroidal

Remarks:

multimodal shapes containing about 50% spheroidal particles and about 50% elongated particles

Percentile:

D10

Typical value:

ca. 0.025 μm

Range:

ca. 0.01 - ca. 0.045 μm

Percentile:

D50

Typical value:

ca. 0.042 μm

Range:

ca. 0.02 - ca. 0.06 μm

Percentile:

D90

Typical value:

ca. 0.069 μm

Range:

ca. 0.05 - ca. 0.09 μm

Fraction of constituent particles in the size range 1-100 nm:

>= 80 - ca. 100 %

Shape category:

elongated

Remarks:

multimodal shapes containing about 50% spheroidal particles and about 50% elongated particles

Percentile:

D10

Typical value:

ca. 0.025 μm

Range:

ca. 0.01 - ca. 0.045 μm

Percentile:

D50

Typical value:

ca. 0.042 μm

Range:

ca. 0.02 - ca. 0.06 μm

Percentile:

D90

Typical value:

ca. 0.069 μm

Range:

ca. 0.05 - ca. 0.09 μm

Typical length:

ca. 0.216 μm

Range of length:

ca. 0.055 - ca. 0.38 μm

Typical aspect ratio (:1):

ca. 4.2 :1

Range of aspect ratio (:1):

>= 4 - <= 4.4

Fraction of constituent particles in the size range 1-100 nm:

>= 80 - ca. 100 %

Structure:

crystalline

Name:

C.I. Pigment Brown 41

Pure structure:

yes

Typical composition:

100 %

Crystal system:

other: unknown

Typical specific surface area:

ca. 48 m²/g

Range of specific surface area:

>= 33 - <= 63 m²/g

Skeletal density:

1.562 g/cm³

Surface treatment applied:

no

Reference 2

Name:

Pigment Brown 41

Type of composition:

boundary composition of the substance

State / form:

solid: nanoform

Reference substance:

Pigment Brown 41

Type of information reported:

single nanoform

Name of nanoform:

C.I. Pigment Brown 41 - joint submission

Shape category:

spheroidal

Shape:

cubic

Pure shape:

no

Range:

> 19 - < 60 %

Shape category:

spheroidal

Shape:

spherical

Pure shape:

no

Range:

> 1 - < 10 %

Shape category:

elongated

Shape:

rod

Pure shape:

no

Range:

> 30 - < 80 %

Shape category:

spheroidal

Percentile:

D10

Range:

ca. 0.01 - ca. 0.055 μm

Percentile:

D50

Range:

ca. 0.015 - ca. 0.07 μm

Percentile:

D90

Range:

ca. 0.04 - ca. 0.1 μm

Fraction of constituent particles in the size range 1-100 nm:

>= 80 - ca. 100 %

Shape category:

elongated

Percentile:

D10

Range:

ca. 0.01 - ca. 0.055 μm

Percentile:

D50

Range:

ca. 0.015 - ca. 0.07 μm

Percentile:

D90

Range:

ca. 0.04 - ca. 0.1 μm

Range of length:

> 0.01 - < 0.54 μm

Range of aspect ratio (:1):

>= 3.8 - <= 4.6

Fraction of constituent particles in the size range 1-100 nm:

>= 80 - ca. 100 %

Structure:

crystalline

Name:

C.I. Pigment Brown 41 - joint submission

Pure structure:

yes

Range of specific surface area:

>= 5 - <= 125 m²/g

Surface treatment applied:

no

PBT status:

the substance is not PBT / vPvB

Justification:

It is concluded here that the registration substance

 - is not ready biodegradable and are considered to fulfil the (v)P criterion

- is not fulfilling the B (or vB) criterion

- and is not fulfilling the T criterion

 

and therefore is evaluated to be not PBT or vPvB substance.

Likely routes of exposure:

The submission substance is not PBT or vPvB. Therefore no emission characterisation is required.