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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Identification

Chemical structure
Display Name:
N,N'-naphthalene-1,5-diylbis[4-[(2,3-dichlorophenyl)azo]-3-hydroxynaphthalene-2-carboxamide]
EC Number:
271-178-7
EC Name:
N,N'-naphthalene-1,5-diylbis[4-[(2,3-dichlorophenyl)azo]-3-hydroxynaphthalene-2-carboxamide]
CAS Number:
68516-75-6
Molecular formula:
C44H26Cl4N6O4
IUPAC Name:
N,N'-naphthalene-1,5-diylbis{4-[(2,3-dichlorophenyl)diazenyl]-3-hydroxy-2-naphthamide}

Type of Substance

Composition:
mono-constituent substance
Origin:
organic

Substance Identifiers

Compositions

Boundary Composition(s) open all close all

State Form:
solid: nanoform


Constituent 1
Chemical structure
Reference substance name:
N,N'-naphthalene-1,5-diylbis[4-[(2,3-dichlorophenyl)azo]-3-hydroxynaphthalene-2-carboxamide]
EC Number:
271-178-7
EC Name:
N,N'-naphthalene-1,5-diylbis[4-[(2,3-dichlorophenyl)azo]-3-hydroxynaphthalene-2-carboxamide]
CAS Number:
68516-75-6
Molecular formula:
C44H26Cl4N6O4
IUPAC Name:
N,N'-naphthalene-1,5-diylbis{4-[(2,3-dichlorophenyl)diazenyl]-3-hydroxy-2-naphthamide}

Characterisation of nanoforms

Type of information reported:
single nanoform
Name of nanoform:
C.I. Pigment Brown 41 - joint submission

Shape

Shape descriptionopen allclose all
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 %

Particle size distribution and range

Particle size distribution and rangeopen allclose all
Shape category:
spheroidal
Percentileopen allclose all
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
Percentileopen allclose all
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 %

Crystallinity

Structures
Structure:
crystalline
Name:
C.I. Pigment Brown 41 - joint submission
Pure structure:
yes

Specific surface area

Range of specific surface area:
>= 5 - <= 125 m²/g

Surface functionalisation / treatment

Surface treatment applied:
no

Legal Entity Composition(s) open all close all

State Form:
solid: nanoform


Constituent 1
Chemical structure
Reference substance name:
N,N'-naphthalene-1,5-diylbis[4-[(2,3-dichlorophenyl)azo]-3-hydroxynaphthalene-2-carboxamide]
EC Number:
271-178-7
EC Name:
N,N'-naphthalene-1,5-diylbis[4-[(2,3-dichlorophenyl)azo]-3-hydroxynaphthalene-2-carboxamide]
CAS Number:
68516-75-6
Molecular formula:
C44H26Cl4N6O4
IUPAC Name:
N,N'-naphthalene-1,5-diylbis{4-[(2,3-dichlorophenyl)diazenyl]-3-hydroxy-2-naphthamide}

Characterisation of nanoforms

Type of information reported:
single nanoform
Name of nanoform:
C.I. Pigment Brown 41 - joint submission

Shape

Shape descriptionopen allclose all
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 %

Particle size distribution and range

Particle size distribution and rangeopen allclose all
Shape category:
spheroidal
Remarks:
multimodal shapes containing about 50% spheroidal particles and about 50% elongated particles
Percentileopen allclose all
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
Percentileopen allclose all
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 %

Crystallinity

Structures
Structure:
crystalline
Name:
C.I. Pigment Brown 41
Pure structure:
yes
Typical composition:
100 %
Crystal system:
other: unknown

Specific surface area

Typical specific surface area:
ca. 48 m²/g
Range of specific surface area:
>= 33 - <= 63 m²/g
Skeletal density:
1.562 g/cm³

Surface functionalisation / treatment

Surface treatment applied:
no
State Form:
solid: particulate/powder


Constituent 1
Chemical structure
Reference substance name:
N,N'-naphthalene-1,5-diylbis[4-[(2,3-dichlorophenyl)azo]-3-hydroxynaphthalene-2-carboxamide]
EC Number:
271-178-7
EC Name:
N,N'-naphthalene-1,5-diylbis[4-[(2,3-dichlorophenyl)azo]-3-hydroxynaphthalene-2-carboxamide]
CAS Number:
68516-75-6
Molecular formula:
C44H26Cl4N6O4
IUPAC Name:
N,N'-naphthalene-1,5-diylbis{4-[(2,3-dichlorophenyl)diazenyl]-3-hydroxy-2-naphthamide}

Composition(s) generated upon use

Other types of composition(s)