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
482595
Poly(ethyleneimine) solution
average Mn ~1,200, average Mw ~1300 by LS, 50 wt. % in H2O
Synonym(s):
Ethyleneimine polymer solution, PEI
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SMILES string
N1CC1
InChI
1S/C2H5N/c1-2-3-1/h3H,1-2H2
InChI key
NOWKCMXCCJGMRR-UHFFFAOYSA-N
mol wt
average Mn ~1,200, average Mw ~1300 by LS
concentration
50 wt. % in H2O
refractive index
n20/D 1.454
viscosity
200-500 cP(25 °C)(lit.)
density
1.08 g/mL at 25 °C
Quality Level
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This Item | |||
|---|---|---|---|
| refractive index n20/D 1.454 | refractive index - | refractive index - | refractive index - |
| viscosity 200-500 cP(25 °C)(lit.) | viscosity - | viscosity - | viscosity - |
| density 1.08 g/mL at 25 °C | density - | density - | density - |
| mol wt average Mn ~1,200 | mol wt Mn ~60,000, Mw 750,000 | mol wt Mr 600,000-1,000,000 | mol wt average Mn 10,000 |
| concentration 50 wt. % in H2O | concentration 50 % (w/v) in H2O | concentration ~50% in H2O | concentration - |
| Quality Level 200 | Quality Level 100 | Quality Level 200 | Quality Level 100 |
General description
Application
signalword
Warning
hcodes
Hazard Classifications
Aquatic Chronic 2 - Skin Sens. 1
Storage Class
10 - Combustible liquids
wgk
WGK 2
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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 it linear or branched?
1 answer-
This polyethyleneimine has a branched polymer structure.
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