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
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
Select a Size
| Size/SKU | Availability | Price |
|---|---|---|
1 g | Estimated to ship onJuly 02, 2026fromMILWAUKEE | $194.00 |
About This Item
Quality Segment
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.)
SMILES string
[C]
InChI
1S/C
InChI key
OKTJSMMVPCPJKN-UHFFFAOYSA-N
General description
Application
Physical form
Preparation Note
1 of 1
This Item | |||
|---|---|---|---|
| form powder | form powder | form powder | form powder |
| assay >98% carbon basis | assay >90% carbon basis | assay 50-80% carbon basis | assay 20-30% MWCNT basis |
| Quality Level 100 | Quality Level 100 | Quality Level - | Quality Level 100 |
| density ~2.1 g/mL at 25 °C (lit.) | density 1.7 g/mL at 25 °C, ~2.1 g/mL at 25 °C (lit.) | density - | density ~2.1 g/mL at 25 °C (lit.) |
| mp 3652-3697 °C (lit.) | mp 3652-3697 °C (lit.) | mp - | mp 3652-3697 °C (lit.) |
| O.D. × L 6-13 nm × 2.5-20 μm | O.D. × L - | O.D. × L - | O.D. × L 7-12 nm × 0.5-10 μm |
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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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How can I determine the shelf life / expiration / retest date of this product?
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What is the electrical conductivity of 698849 Carbon nanotube, multi-walled?
1 answer-
The electrical conductivity is not determined for this multi-walled carbon nanotube.
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How is shipping temperature determined? And how is it related to the product storage temperature?
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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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