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698849

Carbon nanotube, multi-walled

>98% carbon basis, O.D. × L 6-13 nm × 2.5-20 μm

Synonym(s):

MWCNT, MWNT, Multiwall carbon nanotube

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$194.00

$194.00

Estimated to ship onFebruary 04, 2026Details

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About This Item

CAS Number:
308068-56-6
MDL number:
MFCD00133992
UNSPSC Code:
12352103
NACRES:
NA.23

Key Documents

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Product Name

Carbon nanotube, multi-walled, >98% carbon basis, O.D. × L 6-13 nm × 2.5-20 μm

InChI

1S/C

InChI key

OKTJSMMVPCPJKN-UHFFFAOYSA-N

SMILES string

[C]

assay

>98% carbon basis

form

powder

composition

carbon, >98% (total metals impurities)

O.D. × L

6-13 nm × 2.5-20 μm

size

10 μm , average length, TEM
12 nm , average diameter, HRTEM

surface area

~220 m2/g , SSA

mp

3652-3697 °C (lit.)

density

~2.1 g/mL at 25 °C (lit.)

Quality Level

100

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1 of 4

This Item
901019901002637351
Carbon nanotube, multi-walled >98% carbon basis, O.D. × L 6-13 nm × 2.5-20 μm

Sigma-Aldrich

698849

Carbon nanotube, multi-walled

Carbon nanotube, multi-walled 50-90 nm diameter, >95% carbon basis

Sigma-Aldrich

901019

Carbon nanotube, multi-walled

Carbon nanotube, multi-walled flake of bundled CNTs, >95% carbon basis, O.D. × L 10-40 nm × 0.5-1.5 mm

Sigma-Aldrich

901002

Carbon nanotube, multi-walled

Carbon nanotube, double-walled 50-80% carbon basis, O.D. × I.D. × L 5 nm × 1.3-2.0 nm × 50 μm

Sigma-Aldrich

637351

Carbon nanotube, double-walled

form

powder

form

-

form

-

form

powder

assay

>98% carbon basis

assay

>95% carbon basis

assay

>95% carbon basis

assay

50-80% carbon basis

Quality Level

100

Quality Level

100

Quality Level

100

Quality Level

-

composition

carbon, >98% (total metals impurities)

composition

-

composition

-

composition

carbon, >90% (trace metal basis)

O.D. × L

6-13 nm × 2.5-20 μm

O.D. × L

-

O.D. × L

10-40 nm × 0.5-1.5 mm

O.D. × L

-

size

10 μm , average length, TEM

size

-

size

-

size

-

Application

A hybrid nanostructure system of MWNTs/titania was fabricated to be used as photodiodes in dye sensitized solar cells.[1] MWNTs were investigated as electrodes for electrochemical biosensors. Use of MWNTs increased the efficacy, sensitivity and mechanical strength of the sensors.[2]
Carbon nanotube, multi-walled (MWNT) belongs to the class of carbonaceous materials with excellent physiochemical, thermo-mechanical and electrochemical properties. This material can be used in a variety of sustainable energy applications such as solar cells, photocatalysis, biosensor, gas sensor, supercapacitor and as a filler that acts as a reinforcement to improve the mechanical property of composites.[3][4][5][6][7][8]

General description

Multi walled carbon nanotubes (MWNTs, CNTs) were prepared by chemical vapor deposition (CVD). In chemical vapor deposition (CVD), a volatile precursor undergoes thermal decomposition at elevated temperatures to form a solid deposit on a substrate.[9] The diameter of the tube ranges between 6-13nm and the average length is 10μm. The multiwalled nanotubes are stable in inert atmosphere upto a temperature of 3697oC. CVD production method is followed by HCl demineralization.

Physical form

average wall thickness 7-13 graphene layers

Preparation Note

Chemical Vapor Deposition (CVD) Method

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
MKCX6903
MKCW6595
MKCR9784
MKCM4355
MKCM1457

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Hybrid carbon nanotubes?TiO2 photoanodes for high efficiency dye-sensitized solar cells.
Dembele KT, et al.
The Journal of Physical Chemistry C, 117(28), 14510-14517 (2013)
A microfluidic chip platform with electrochemical carbon nanotube electrodes for pre-clinical evaluation of antibiotics nanocapsules.
Hong CC, et al.
Biosensors And Bioelectronics, 26(8), 3620-3626 (2011)
Jin Wuk Lee et al.
Aquatic toxicology (Amsterdam, Netherlands), 171, 9-19 (2015-12-31)
Multi-walled carbon nanotubes (MWCNTs) are nanoparticles widely applicable in various industrial fields. However, despite the usefulness of MWCNTs in industry, their oxidative stress-induced toxicity, combined toxicity with metal, and mitogen-activated protein kinase (MAPK) activation have not been widely investigated in
Effect of the method of dispersion on the properties of carbon nanotube and microfibrillar cellulose composites
Nadera A
Inventia Report, 433 (2013)
Si Gao et al.
Nature communications, 8(1), 163-163 (2017-08-02)
Knowing the three-dimensional structural information of materials at the nanometer scale is essential to understanding complex material properties. Electron tomography retrieves three-dimensional structural information using a tilt series of two-dimensional images. In this paper, we report an alternative combination of
View All Related Papers

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3D Printable Conductive Nanocomposites of PLA and Multi-walled Carbon Nanotubes

A nanocomposite is typically defined as a mixture between a host material (e.g., polymer matrix) and nanofillers with at least one dimension of less than 100 nm.

Substrate and Conductor Materials Towards More Sustainable Electronics

The European Green Deal and Circular Economy Action Plan address resource challenges with eco-products and circulatory work, while the revised EU Ecodesign Directive promotes e-waste reduction and natural resource value reform. This review examines renewable substrates and conductive materials for flexible electronics.

Graphene-Based Transparent Conductive Electrodes

A transparent conductive electrode (TCE) is an essential component of various optoelectronic devices such as solar cells, liquid-crystal displays (LCD), light-emitting diodes (LED), and touch screens.

Polymer-Sorted Carbon Nanotubes

SWCNTs show promise in FETs, solar cells, and photodetectors due to their ultrafast charge transport mobility.

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Questions

1–3 of 3 Questions  

  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/418/501/product-dating-information-06-25-mk.pdf

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  2. What is the electrical conductivity of 698849 Carbon nanotube, multi-walled?

    1 answer

    1. The electrical conductivity is not determined for this multi-walled carbon nanotube.

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  3. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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