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8.21037

Sigma-Aldrich

Poli(etilenoglicol)

2000, for synthesis

Sinônimo(s):

PEG

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About This Item

Fórmula linear:
H(OCH2CH2)nOH
Número CAS:
25322-68-3
Número MDL:
MFCD00081839
Código UNSPSC:
13111021
Número do índice EC:
500-038-2
NACRES:
NA.22
Preço e disponibilidade não estão disponíveis no momento.

pressão de vapor

<0.1 hPa

Nível de qualidade

200

Formulário

flakes

temperatura de autoignição

420 °C

potência

28000 mg/kg LD50, oral (Rat)
>20000 mg/kg LD50, skin (Rabbit)

pH

4-7 (20 °C, 100 g/L in H2O)

Viscosidade cinemática

46-55 cSt(20 °C) (50% solution)

pf

49-52 °C

temperatura de transição

flash point 250 °C

solubilidade

600 g/L

densidade

1.21 g/cm3 at 20 °C

densidade volumétrica

400‑500 kg/m3

temperatura de armazenamento

no temp limit

cadeia de caracteres SMILES

C(CO)O

InChI

1S/C2H6O2/c3-1-2-4/h3-4H,1-2H2

chave InChI

LYCAIKOWRPUZTN-UHFFFAOYSA-N

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Aplicação

Polyethylene glycol 2000 is a hydrophilic linear polymer that can be used as:
  • An organic additive in the synthesis of metal nanoparticles to control the size and morphology of nanostructure.[1][2]
  • A carbon source to prepare acidophilic highly fluorescent carbon dots (CDs) via the one-pot hydrothermal method.[3]
  • A dispersion stabilizer to synthesize amorphous Fe2O3 nanoparticles by microwave irradiation method. During the synthesis, PEG-2000 inhibits nonhomogeneous precipitation to obtain homogeneous precipitation of the metal nanoparticles.[2]

Nota de análise

Hydroxyl value: 51 - 63
Melting range (lower value): ≥ 50 °C
Melting range (upper value): ≤ 55 °C
Average molecular mass: 1900 - 2200
Identity (IR): passes test

Código de classe de armazenamento

10 - Combustible liquids

Classe de risco de água (WGK)

WGK 1

Ponto de fulgor (°F)

281.5 °F - closed cup

Ponto de fulgor (°C)

138.6 °C - closed cup

Certificados de análise (COA)

Busque Certificados de análise (COA) digitando o Número do Lote do produto. Os números de lote e remessa podem ser encontrados no rótulo de um produto após a palavra “Lot” ou “Batch”.

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Yujuan Chen et al.
ACS omega, 2(8), 5251-5259 (2017-08-31)
Acidophilic highly-photoluminescent ionic liquid (IL)-modified carbon dots (CDs) were fabricated directly from polyethylene glycol-2000 (PEG2000N) by a simple one-step hydrothermal method in a system containing an IL (1-butyl-3-methylimidazolium bromide [C4mim]Br) and hydrochloric acid (HCl). In this process, PEG2000N works as
Synthesis of amorphous Fe2O3 nanoparticles by microwave irradiation
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Materials Letters, 50(5-6), 341-346 (2001)
Solvothermal synthesis and characterization of crystalline CaWO4 nanoparticles
Chen S-J, et al.
Journal of Crystal Growth, 253(1-4), 361-365 (2003)

Questions

1–2 of 2 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

      Helpful?

  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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