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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
branched and cross-linked multi-walled carbon nanotubes
Molecular formula:
C
IUPAC Name:
branched and cross-linked multi-walled carbon nanotubes

Type of Substance

Composition:
mono-constituent substance
Origin:
inorganic

Substance Identifiers

Compositions

Boundary Composition(s) open all close all

State Form:
solid: nanoform


Constituent 1
Chemical structure
Reference substance name:
branched and cross-linked multi-walled carbon nanotubes
Molecular formula:
C
IUPAC Name:
branched and cross-linked multi-walled carbon nanotubes

Characterisation of nanoforms

Type of information reported:
single nanoform
Name of nanoform:
branched and cross-linked multi-walled carbon nanotubes_elongated non rigid nanoform

Shape

Shape description
Shape category:
elongated
Shape:
tube
Pure shape:
yes

Particle size distribution and range

Particle size distribution and range
Shape category:
elongated
Percentileopen allclose all
Percentile:
D10
Typical value:
8 nm
Range:
> 6 - < 9 nm
Percentile:
D50
Typical value:
11 nm
Range:
> 9 - < 13 nm
Percentile:
D90
Typical value:
20 nm
Range:
> 19 - < 21 nm
Typical length:
50 μm
Range of length:
> 25 - < 140 μm
Typical aspect ratio (:1):
5 000 :1
Range of aspect ratio (:1):
>= 1 250 - <= 28 000
Additional information:
ASSEMBLY STRUCTURE:

The inner diameter of the individual multiwalled carbon nanotubes that are part of the carbon nanostructures ranges from 3-8 nm and the outer diameter ranges from 5 to 20 nm, The number of walls ranges from 2-14. Carbon nanostructures (CNS) are cross linked and branched multiwalled carbon nanotubes in which internal carbon nanotube walls are shared between adjacent tubes and can be considered a highly structurally entangled polymer of multi-walled carbon nanotubes.

RIGIDITY:

CNS structure is not rigid. It can be considered a highly entangled polymer of multi-walled carbon nanotubes. The final particle size of CNS flakes is micron-sized (approximately 20µ to 120µ in three dimensions). TEM images are shown in Section 1.4.
Fraction of constituent particles in the size range 1-100 nm:
>= 100 - <= 100 %

Crystallinity

Structures
Structure:
partially-crystalline
Name:
Graphitic
Pure structure:
no
Typical composition:
45 %
Range:
> 40 - < 47 %
Crystal system:
hexagonal

Specific surface area

Typical specific surface area:
200 m²/g
Range of specific surface area:
> 150 - < 350 m²/g

Surface functionalisation / treatment

Surface treatment applied:
no

Legal Entity Composition(s) open all close all

State Form:
solid: nanoform


Constituent 1