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
81323
Poly(ethylene glycol) methyl ether
average MN 5,000, methoxy, hydroxyl
Synonyma:
Polyethylene glycol, Methoxy poly(ethylene glycol), Polyethylene glycol monomethyl ether, mPEG
Vybrat velikost
| Vám/Skladová položka | Dostupnost | Cena |
|---|---|---|
250 g | Obraťte se na zákaznický servis a vyžádejte si informaci o dostupnosti. | 1 660,00 Kč |
1 kg | Obraťte se na zákaznický servis a vyžádejte si informaci o dostupnosti. | 4 820,00 Kč |
O této položce
1 660,00 Kč
Název produktu
Poly(ethylene glycol) methyl ether, average Mn 5,000
vapor density
>1 (vs air)
Quality Segment
vapor pressure
0.05 mmHg ( 20 °C)
form
flakes, powder or crystals
mol wt
average Mn 5,000
mp
60-64 °C
Ω-end
hydroxyl
α-end
methoxy
SMILES string
O(CCO)C
InChI
1S/C3H8O2/c1-5-3-2-4/h4H,2-3H2,1H3
InChI key
XNWFRZJHXBZDAG-UHFFFAOYSA-N
Application
Other Notes
1 of 1
Tato položka | |||
|---|---|---|---|
| description average Mn 5,000 | description average Mn 20,000 | description average Mn 750 | description average mol wt 350 |
| form flakes, powder or crystals | form powder or crystals | form paste, solid | form - |
| Quality Level 200 | Quality Level 100 | Quality Level 200 | Quality Level 200 |
| mol wt average Mn 5,000 | mol wt average Mn 20,000 | mol wt average Mn 750 | mol wt average mol wt 350 |
| mp 60-64 °C | mp 64-69 °C | mp - | mp - |
| vapor pressure 0.05 mmHg ( 20 °C) | vapor pressure 0.05 mmHg ( 20 °C) | vapor pressure 0.05 mmHg ( 20 °C) | vapor pressure - |
| vapor density >1 (vs air) | vapor density >1 (vs air) | vapor density >1 (vs air) | vapor density - |
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Skladovací třída
10 - Combustible liquids
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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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
Helpful?
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Active Filters
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- Charitable Donation
Proton NMR spectrum of poly(etylene glycol)methyl ether does not indicate the structure!
Dear SA,
Your product MPEG5000 seems to have different structures/contaminants... In the spectra, by comparing -OCH3 end group protons with etylene protons, the degree of polymerisation calculated to be 50,7 instead of 113. Thus Mn is around 2260 g/mol (nor 5000 g/mol). Additionaly, there is an extra peak at 1,8-1,9 ppm is not related with MPEG5000 structure.. Our GPC study also indicates Mn around 2400 (not 5000) which fits well with NMR data... Please, reevaluate the structure of your product by considering our results...- A donation to charity was made for this review
- Yes
Recommends this productNoHelpful?
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We would like to investigate this further.
Please visit https://www.sigmaaldrich.com/US/en/support/customer-support to submit a Product Technical Inquiry.
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High dispersity!
Dispersity is 1.18! Not suitable for my experiment:(
- A donation to charity was made for this review
- No
Recommends this productNoHelpful?
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We are sorry to hear this polydispersity value is not suitable for your application. Each lot is tested for polydispersity, the value is reported on the COA but we do not provide a specification range. The values from three of our past lots are 1.35, 1.35, and 1.34. You can search for the result of your lot by using the COA search on this page.
If you observed a different polydispersity than what is listed on your lot specific COA, you can contact us for additional technical support. Please visit https://www.sigmaaldrich.com/US/en/support/customer-support to submit a Product Technical Inquiry.
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