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
730785
Silver, dispersion
nanoparticles, 10 nm particle size, 0.02 mg/mL in aqueous buffer, contains sodium citrate as stabilizer
Synonym(s):
Colloidal silver
Select a Size
| Pack Size | SKU | Availability | Price |
|---|---|---|---|
| 25 mL | Please contact Customer Service for Availability | €159.00 | |
Please contact Customer Service for Availability | €356.00 |
About This Item
form
nanoparticles
Quality Level
contains
sodium citrate as stabilizer
concentration
0.02 mg/mL in aqueous buffer
refractive index
n20/D 1.333
particle size
10 nm
density
0.997 g/mL at 25 °C
fluorescence
λem 388 nm FWHM 59 nm
storage temp.
2-8°C
SMILES string
[Ag]
InChI
1S/Ag
InChI key
BQCADISMDOOEFD-UHFFFAOYSA-N
General description
Application
1 of 1
This Item | |||
|---|---|---|---|
| particle size 10 nm | particle size 100 nm | particle size 40 nm | particle size 20 nm |
| form nanoparticles | form nanoparticles | form nanoparticles | form nanoparticles |
| contains sodium citrate as stabilizer | contains sodium citrate as stabilizer | contains sodium citrate as stabilizer | contains sodium citrate as stabilizer |
| fluorescence λem 388 nm FWHM 59 nm | fluorescence λem 504 nm FWHM 167 nm | fluorescence λem 412 nm FWHM 63 nm | fluorescence λem 401 nm FWHM 66 nm |
| density 0.997 g/mL at 25 °C | density 0.9978 g/mL at 25 °C | density 0.990 g/mL at 25 °C | density 0.986 g/mL at 25 °C |
| Quality Level 100 | Quality Level 100 | Quality Level 100 | Quality Level 100 |
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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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Articles
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Global Trade Item Number
| SKU | GTIN |
|---|---|
| 730785-250ML | 04065273539844 |
| 730785-25ML | 04061832865294 |
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How can I determine the shelf life / expiration / retest date of this product?
1 answer-
Helpful?
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How is shipping temperature determined? And how is it related to the product storage temperature?
1 answer-
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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it can able to scatter light when it absorbs particular wavelength of light?
1 answer-
Yes, this item is a silver dispersion. Silver nanoparticles do scatter light. The product specification range is 380-405 nm. As reported in the Properties section, the fluorescence λem is 388 nm with the FWHM at 59 nm and a refractive index of n20/D 1.333.
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Hi, I see that this silver colloidal is water based, but I could not find the information of which materials it is soluble. For example, is it soluble in chloroform or DMSO?
1 answer-
The product is a dispersion of silver nanoparticles in an aqueous buffer. Aqueous dispersants appear to be the the standard format. Please check the literature for further diluting in organic solvents or DMSO:
https://www.sigmaaldrich.com/search/730785?focus=papers&page=1&perpage=30&sort=relevance&term=730785&type=citation_search
https://www.sigmaaldrich.com/search/730785aldrich?facet=facet_content_type%3ATechnical%20Article&focus=sitecontent&page=1&perpage=30&sort=relevance&term=730785aldrich&type=site_contentHelpful?
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sulla descrizione del prodotto è indicato che sono sospese in buffer acquoso. Di quale buffer si tratta? e a che pH sono? grazie
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The buffer used for product 730785 is a 2mM sodium citrate buffer. The pH of the solution is 6.9.
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