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
63187
Methoxypolyethylene glycol maleimide
≥90% (NMR), 5,000
Synonym(s):
Polyethylene glycol, MeO-PEG-Mal, PEG-maleimide, mono-Methyl polyethylene glycol 2-maleimidoethyl ether
About This Item
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assay
≥90% (NMR)
mol wt
PEG average Mn 5,000
Ω-end
maleimide
α-end
methoxy
storage temp.
−20°C
Quality Level
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This Item | 712558 | 712469 | 85973 |
|---|---|---|---|
| assay ≥90% (NMR) | assay - | assay - | assay ≥80% (NMR) |
| Quality Level 200 | Quality Level 100 | Quality Level 100 | Quality Level - |
| mol wt PEG average Mn 5,000 | mol wt PEG average Mn 750 | mol wt PEG average Mn 10,000 g/mol | mol wt PEG average Mn 5,000 |
| storage temp. −20°C | storage temp. −20°C | storage temp. −20°C | storage temp. −20°C |
| Ω-end maleimide | Ω-end maleimide | Ω-end maleimide | Ω-end NHS ester |
| α-end methoxy | α-end methoxy | α-end methoxy | α-end methoxy |
Application
related product
Storage Class
11 - Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
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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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