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
181978
Poly(ethyleneimine) solution
average Mn ~60,000 by GPC, average Mw ~750,000 by LS, 50 wt. % in H2O
Synonym(s):
Ethyleneimine polymer solution, PEI
Select a Size
| Pack Size | SKU | Availability | Price |
|---|---|---|---|
| 5 g | Estimated to ship TODAYfromMILWAUKEE | $67.00 | |
| 100 g | Estimated to ship TODAYfromMILWAUKEE | $123.00 | |
| 250 g | Estimated to ship TODAYfromMILWAUKEE | $188.00 | |
| 18 kg | Check Cart for Availability | $2,070.00 |
About This Item
$67.00
Estimated to ship TODAYDetails
vapor pressure
9 mmHg ( 20 °C)
Quality Level
mol wt
average Mn ~60,000 by GPC, average Mw ~750,000 by LS
concentration
50 wt. % in H2O
SMILES string
N1CC1
InChI
1S/C2H5N/c1-2-3-1/h3H,1-2H2
InChI key
NOWKCMXCCJGMRR-UHFFFAOYSA-N
Application
Physical form
1 of 1
This Item | |||
|---|---|---|---|
| vapor pressure 9 mmHg ( 20 °C) | vapor pressure - | vapor pressure - | vapor pressure - |
| Quality Level 200 | Quality Level 200 | Quality Level 200 | Quality Level 100 |
| concentration 50 wt. % in H2O | concentration 50 wt. % in H2O | concentration 50 wt. % in H2O | concentration 50 % (w/v) in H2O |
| mol wt average Mn ~60,000 by GPC | mol wt average Mn ~1,200, average Mw ~1300 by LS | mol wt average Mw 1800 | mol wt Mn ~60,000, Mw 750,000 |
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signalword
Warning
hcodes
Hazard Classifications
Acute Tox. 4 Oral - Aquatic Chronic 2 - Eye Irrit. 2 - Skin Sens. 1
Storage Class
10 - Combustible liquids
wgk
WGK 2
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter
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Global Trade Item Number
| SKU | GTIN |
|---|---|
| 181978-5G | 04061838755483 |
| 181978-18KG | 04061838755476 |
| 181978-100G | 04061838755469 |
| 181978-250G | 04061838252203 |
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How can I determine the shelf life / expiration / retest date of this product?
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Hi, could you please confirm whether the Mw of this product (determined by light scattering) is 750,000 and not 75,000? In other words, does the product have an Mn/Mw ratio of 12.5 or 1.25? Thank you!
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The product has a Mw of 750,000 by light scattering.
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Hello, Could you please confirm that all of the PEI products you sell are of branched PEI for molecular weight 60.000?
1 answer-
The PEI products offered with a molecular weight of 60,000 are branched.
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Are there any details available about the amine group distribution of this polyethyleneimine?
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Unfortunately, the amine group distribution in this product is not determined or provided in the product documentation. This means that information about the exact ratio of primary, secondary, and tertiary amines in this particular polyethyleneimine may not be available.
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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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I don't see storage information here. What are the storage recommendations for this product?
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This product should be stored in room temperature. Store under inert gas. Please note that this chemical is sensitive to carbon dioxide.
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What possible impurities are present in Product 181978, Poly(ethyleneimine) solution?
1 answer-
Although Sigma-Aldrich does not currently test for the impurities in this product, 2-aminoethanol and less than 50 ppb of unreacted monomer may be present as a result of the manufacturing process.
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What is the Department of Transportation shipping information for this product?
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Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
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I see two molecular weight values reported for Product 181978, Poly(ethyleneimine) solution. Which one is correct?
1 answer-
Both of the approximate molecular weights listed for this product are correct based on the testing methods used by Sigma-Aldrich. However, each molecular weight is determined by a different method. The Mn refers to the number-average molecular weight (determined by GPC) while the Mw refers to the weight-average molecular weight (determined by Light Scattering). These two numbers are different but still related. The polydispersity is the measure of uniformity of the molecules in a polymer sample. A ratio of the weight-average molecular and the number-average molecular weight indicates how uniform the polymer sample is. The greater the ratio the less uniform the polymer molecules.
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Product 181978, Poly(ethyleneimine) solution, is listed as a solution but it is sold by weight; is this a solid or a liquid?
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This product is a solution of Poly(ethyleneimine) in water. However, this product, like many Sigma-Aldrich products, is weighed into the bottle. If 5 grams of this solution is purchased, approximately 4.62mL will be received.
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