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
202509
Poly(ethylene glycol) methyl ether
average Mn 2,000, methoxy, hydroxyl
Synonym(s):
Polyethylene glycol, Methoxy poly(ethylene glycol), Polyethylene glycol monomethyl ether, mPEG
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Product Name
Poly(ethylene glycol) methyl ether, average Mn ~2,000
SMILES string
O(CCO)C
InChI
1S/C3H8O2/c1-5-3-2-4/h4H,2-3H2,1H3
InChI key
XNWFRZJHXBZDAG-UHFFFAOYSA-N
vapor density
>1 (vs air)
vapor pressure
0.05 mmHg ( 20 °C)
form
flakes (or pellets)
mol wt
average Mn ~2,000
viscosity
54.6 cSt(210 °F)(lit.)
transition temp
Tm 52 °C
functional group
hydroxyl
Quality Level
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Related Categories
1 of 4
This Item | 81323 | 732613 | 202487 |
|---|---|---|---|
| form flakes (or pellets) | form flakes, powder or crystals | form powder or crystals | form semisolid |
| functional group hydroxyl | functional group - | functional group - | functional group - |
| Quality Level 200 | Quality Level 200 | Quality Level 100 | Quality Level 200 |
| mol wt average Mn ~2,000 | mol wt average Mn 5,000 | mol wt average Mn 20,000 | mol wt average Mn 550 |
| vapor density >1 (vs air) | vapor density >1 (vs air) | vapor density >1 (vs air) | vapor density >1 (vs air) |
| vapor pressure 0.05 mmHg ( 20 °C) | vapor pressure 0.05 mmHg ( 20 °C) | vapor pressure 0.05 mmHg ( 20 °C) | vapor pressure 0.05 mmHg ( 20 °C) |
Application
It can be used as a pore-forming agent in the preparation of ultrafiltration membranes which are used in the removal of macromolecules.
It can also be used as a starting material in the preparation of a biodegradable amphiphilic copolymer of poly(L-alanine) with mPEG.
Features and Benefits
General description
Storage Class
11 - Combustible Solids
wgk
WGK 1
flash_point_f
359.6 °F - closed cup
flash_point_c
182 °C - closed cup
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?
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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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