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408719

Sigma-Aldrich

支化聚乙烯亚胺

average Mw ~800 by LS, average Mn ~600 by GPC

别名:

PEI, 支化乙二胺

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About This Item

线性分子式:
H(NHCH2CH2)nNH2
CAS号:
25987-06-8
MDL编号:
MFCD00084427
UNSPSC代码:
12162002
NACRES:
NA.23
价格与库存信息目前不能提供

表单

viscous liquid

质量水平

200

分子量

average Mn ~600 by GPC
average Mw ~800 by LS

折射率

n20/D 1.5240

密度

1.050 g/mL at 25 °C

SMILES字符串

N1CC1.NCCN

InChI

1S/C2H8N2.C2H5N/c3-1-2-4;1-2-3-1/h1-4H2;3H,1-2H2

InChI key

SFLOAOINZSFFAE-UHFFFAOYSA-N

相关类别

一般描述

聚乙烯亚胺是一种亲水性聚合物，作为一种非病毒合成载体，广泛用于体内递送治疗性核酸。由于其优异的理化性质，它被应用于蛋白质的分离和纯化、二氧化碳吸收、药物载体、废水处理、生物标记等多个领域。

应用

支链型PEI可作为前体合成共轭多聚体，用于高效基因转染。PEI与Jeffamine聚醚的共轭化和PEI氨基的胍化可降低多聚体的细胞毒性，并保护其在血清蛋白存在下不会发生聚焦。

PEI 浸渍竹炭可用作CO2吸附剂。PEI中存在大量的氨基基团，可在酸碱作用下与CO2发生反应，增强竹炭的吸附能力。

它还可用于制备对有机药物分子具有高配位能力的交联水溶性聚合物。

特点和优势

  • 支链型PEI具有较好的络合 能力和缓冲能力。
  • 高离子交换 能力和对蛋白质的亲和力。
  • 显著的DNA转移效率。

外形

支化聚合物

警示用语：

Danger

危险声明

H302,H318,H411

危险分类

Acute Tox. 4 Oral - Aquatic Chronic 2 - Eye Dam. 1

储存分类代码

10 - Combustible liquids

WGK

WGK 3

闪点(°F)

356.0 °F

闪点(°C)

180 °C

个人防护装备

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter

历史批次信息供参考:

分析证书(COA)

Lot/Batch Number
WXBF4895V
MKCV6718
MKCJ2767
MKCG7251
MKCG3800

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Valentina Dinca et al.
Sensors (Basel, Switzerland), 18(12) (2018-12-07)
Developing a controlled method for obtaining hybrid enzymatic-based interfaces for sensing application require the use of a multiuse, reusable sensor. By controlling the interface characteristics in terms of the surface chemistry, thickness, and roughness, a tailored response toward various toxic
Andrew Jajack et al.
PloS one, 14(1), e0210286-e0210286 (2019-01-17)
Insurmountable detection challenges will impede the development of many of the next-generation of lab-on-a-chip devices (e.g., point-of-care and real-time health monitors). Here we present the first membrane-based, microfluidic sample preconcentration method that is continuous, quantifiable, simple, and capable of working
Irena Mamajanov et al.
Life (Basel, Switzerland), 10(8) (2020-08-23)
Enzymes are biological catalysts that are comprised of small-molecule, metal, or cluster catalysts augmented by biopolymeric scaffolds. It is conceivable that early in chemical evolution, ancestral enzymes opted for simpler, easier to assemble scaffolds. Herein, we describe such possible protoenzymes:
Jonathon M Muncie et al.
Developmental cell, 55(6), 679-694 (2020-11-19)
Embryogenesis is directed by morphogens that induce differentiation within a defined tissue geometry. Tissue organization is mediated by cell-cell and cell-extracellular matrix (ECM) adhesions and is modulated by cell tension and tissue-level forces. Whether cell tension regulates development by modifying
Anna Alhaddad et al.
PloS one, 7(12), e52207-e52207 (2013-01-04)
Small interfering RNAs (siRNAs) are powerful tools commonly used for the specific inhibition of gene expression. However, vectorization is required to facilitate cell penetration and to prevent siRNA degradation by nucleases. We have shown that diamond nanocrystals coated with cationic
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Questions

1–7 of 7 Questions  

  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. 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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  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. 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/449/386/product-dating-information-mk.pdf

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  3. 1) What is the maximum wt % absorption of CO2 relative to the weight of PEI 2) Does PEI liquid absorb CO2 by surface absorption/adhesion - or by diffusion into the fluid?

    1 answer

    1. Theoretically, it’s about equal amounts of CO2 and PEI by mass. The effective monomeric unit of the PEI is the (-CH2CH2NH-) group, with a formula weight of 43.07. The formula weight of carbon dioxide is 44.01. Each monomeric unit of the PEI can react with one molecule of CO2, and since 43.07 is so close to 44.01, the weight of the PEI and the CO2 would be almost the same. Practically speaking, the reaction is probably not 100% efficient.
      The PEI absorbs the CO2 by a chemical reaction…an acid-base reaction. Carbon dioxide in aqueous solution is sometimes referred to as carbonic acid. (CO2 + H2O ---> H2CO3) And the amino groups of the PEI are the base. The reaction product is a protonated amine (-NH3 + or -NHR2 +) with a bicarbonate anion (HCO3 - ) as the counterion.

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  4. Is this product soluble in water ?

    1 answer

    1. This material is readily soluble in water, ethanol, methanol, isopropanol, and n-propanol. In addition, the product is partially soluble in ethyl acetate, toluene, and xylene. Other sources report that this PEI is also soluble in chloroform.

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  5. What is the percentage of Polyethylenimine in the solution?

    1 answer

    1. This product is considered a neat/pure material. It just happens to be a liquid at room temperature, but it is not in solution; there is no solvent added.

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  6. What is the n value in the structure of this PEI?

    1 answer

    1. The n value in the structure is not determined.

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  7. What's the molar ratio of primary, secondary and tertiary amines?

    1 answer

    1. The molar ratio of the primary, secondary, and tertiary amines is not determined. However, the amine value is approximately 576 (primary and secondary). This product is PEI800 and equivalent to Lupasol FG.
      See the link below for a paper that suggests a general amine ratio (Table 6):
      https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5872989/

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