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774081

Sigma-Aldrich

Copper

nanopowder, 25 nm particle size (TEM)

Synonym(s):

Copper nanoparticles

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About This Item

Empirical Formula (Hill Notation):
Cu
CAS Number:
7440-50-8
Molecular Weight:
63.55
EC Number:
231-159-6
MDL number:
MFCD00010965
UNSPSC Code:
12352302
PubChem Substance ID:
329767661
NACRES:
NA.23
Pricing and availability is not currently available.

form

nanopowder

resistivity

1.673 μΩ-cm, 20°C

particle size

25 nm (TEM)

bp

2567 °C (lit.)

mp

1083.4 °C (lit.)

density

8.94 g/mL at 25 °C (lit.)

SMILES string

[Cu]

InChI

1S/Cu

InChI key

RYGMFSIKBFXOCR-UHFFFAOYSA-N

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General description

This copper nanopowder is a fine reddish-brown to black powder made of metallic copper nanoparticles with an average particle size of 25 nm. The particles are not oxidized and we recommend storing the product under inert gas to preserve the unoxidized surfaces.

Application

Copper nanopowder, 25 nm can be used for a variety of applications such as printed electronics,[1] electroless copper plating,[2] heat transfer fluids, catalysis,[3] and thermal energy storage.[4]

Pictograms

FlameEnvironment
GHS02,GHS09

Signal Word

Danger

Hazard Statements

H228,H251,H410

Hazard Classifications

Aquatic Acute 1 - Aquatic Chronic 1 - Flam. Sol. 2 - Self-heat. 1

Storage Class Code

4.2 - Pyrophoric and self-heating hazardous materials

WGK

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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Certificates of Analysis (COA)

Lot/Batch Number
STBL3780
STBL2768
STBL0488
STBK7875
STBK4335

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Chih-Ying Lee et al.
Chemosphere, 261, 128051-128051 (2020-10-30)
The potential toxicity of copper nanoparticles (CuNPs) to early stages of fishes is not fully understood, and little is known about their effects on ionocytes and associated functions. This study used zebrafish embryos as a model to investigate the toxic
Evaluation of copper nanoparticles-Paraffin wax compositions for solar thermal energy storage
Lin SC and Al-Kayiem HH
Solar Energy, 132, 267-278 (2016)
Low-cost and high-throughput synthesis of copper nanopowder for nanofluid applications
Maji NC, et al.
Chemical Engineering Journal, 353, 34-45 (2018)
Copper nanoparticles for printed electronics: routes towards achieving oxidation stability
Magdassi S, et al.
Materials, 3(9), 4626-4638 (2010)
Chan; G.H.;
Nano Letters, 7(7), 1947-1952 (2007)
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Questions

1–2 of 2 Questions  

  1. 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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  2. 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/449/386/product-dating-information-mk.pdf

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