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
79633
Micro particles based on polystyrene
size: 5 μm
Synonym(s):
Latex beads from PS
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form
aqueous suspension
crosslinking
0 % cross-linked
concentration
10% (solids)
particle size
5 μm std dev <0.1 μm, coeff var <2%
density
1.05 g/cm3
storage temp.
2-8°C
Quality Level
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This Item | 50675 | 65984 | 72986 |
|---|---|---|---|
| form aqueous suspension | form aqueous suspension | form aqueous suspension | form aqueous suspension |
| crosslinking 0 % cross-linked | crosslinking - | crosslinking - | crosslinking 2 % cross-linked |
| concentration 10% (solids) | concentration 10% (solids) | concentration 10% (solids) | concentration 10% (solids) |
| particle size 5 μm std dev <0.1 μm, coeff var <2% | particle size 600 nm std dev ≤0.03 μm | particle size 800 nm std dev ≤0.03 μm | particle size 10 μm std dev <0.2 μm, coeff var <2% |
| density 1.05 g/cm3 | density 1.05 g/cm3 | density 1.05 g/cm3 | density 1.05 g/cm3 |
| storage temp. 2-8°C | storage temp. 2-8°C | storage temp. 2-8°C | storage temp. 2-8°C |
Analysis Note
Storage Class
12 - Non Combustible Liquids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves
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How can I determine the shelf life / expiration / retest date of this product?
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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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Is the buffer pure water? Or are there other chemicals in the aqueous solution to keep the beads from sticking together?
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The beads are suspended in deionized water, with no buffer or additives.
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ARE THESE GRANULES MADE UP OF 100% POLYSTYRENE, OR ANY OTHER IMPURITIES ALSO PRESENT TO GIVE SHAPE AND MAINTAIN IT?
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This product is essentially pure polystyrene. The impurities are not determined for this product. However, as a part of the synthesis process, there are sulfate groups on the surface of the beads.
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マイクロビーズの密度は何個/mLでしょうか？
1 answer-
The density of this product is 1.05 g/cm3 as mentioned in the "Properties" section of the product detail page. The number of beads per milliliter is not determined.
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