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
730793
Silver, dispersion
nanoparticles, 20 nm particle size, 0.02 mg/mL in aqueous buffer, contains sodium citrate as stabilizer
Synonym(s):
Colloidal silver
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$192.00
$395.00
About This Item
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InChI
1S/Ag
SMILES string
[Ag]
InChI key
BQCADISMDOOEFD-UHFFFAOYSA-N
form
nanoparticles
contains
sodium citrate as stabilizer
concentration
0.02 mg/mL in aqueous buffer
Quality Level
refractive index
n20/D 1.333
particle size
20 nm
density
0.986 g/mL at 25 °C
fluorescence
λem 401 nm FWHM 66 nm
storage temp.
2-8°C
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Related Categories
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This Item | |||
|---|---|---|---|
| particle size 20 nm (TEM) | particle size 40 nm (TEM) | particle size 60 nm (TEM) | particle size ≤10 nm |
| form nanoparticles | form nanoparticles | form nanoparticles | form dispersion, nanoparticle |
| contains sodium citrate as stabilizer | contains sodium citrate as stabilizer | contains sodium citrate as stabilizer | contains - |
| concentration 0.02 mg/mL in aqueous buffer | concentration 0.02 mg/mL in aqueous buffer | concentration 0.02 mg/mL in aqueous buffer | concentration 40-50 wt. % |
| refractive index n20/D 1.333 | refractive index n20/D 1.333 | refractive index n20/D 1.333 | refractive index n20/D 1.333 |
| density 0.986 g/mL at 25 °C | density 0.990 g/mL at 25 °C | density 0.9976 g/mL at 25 °C | density 1.5-1.8 g/mL at 25 °C |
General description
Application
- Surface-enhanced Raman analysis of sulfa drugs on colloidal silver dispersion.: This research explores the application of colloidal silver dispersion for the surface-enhanced Raman scattering (SERS) analysis of sulfa drugs. The study demonstrates the potential of silver nanoparticles in enhancing Raman signals, making it a valuable technique for detecting and analyzing pharmaceuticals at low concentrations (Sutherland et al., 1990).
signalword
Warning
hcodes
pcodes
Hazard Classifications
Aquatic Acute 1 - Aquatic Chronic 1
Storage Class
12 - Non Combustible Liquids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
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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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