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8.21037

Sigma-Aldrich

Polyethylenglykol

2000, for synthesis

Synonym(e):

Poly(ethylenglykol), PEG

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About This Item

Lineare Formel:
H(OCH2CH2)nOH
CAS-Nummer:
25322-68-3
MDL-Nummer:
MFCD00081839
UNSPSC-Code:
13111021
EG-Index-Nummer:
500-038-2
NACRES:
NA.22
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Dampfdruck

<0.1 hPa

Qualitätsniveau

200

Form

flakes

Selbstzündungstemp.

420 °C

Wirksamkeit

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

pH-Wert

4-7 (20 °C, 100 g/L in H2O)

Kinematische Viskosität

46-55 cSt(20 °C) (50% solution)

mp (Schmelzpunkt)

49-52 °C

Übergangstemp.

flash point 250 °C

Löslichkeit

600 g/L

Dichte

1.21 g/cm3 at 20 °C

Schüttdichte

400‑500 kg/m3

Lagertemp.

no temp limit

SMILES String

C(CO)O

InChI

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

InChIKey

LYCAIKOWRPUZTN-UHFFFAOYSA-N

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Anwendung

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]

Hinweis zur Analyse

Hydroxylzahl: 51 - 63
Schmelzbereich (unterer Wert): ≥ 50 °C
Schmelzbereich (oberer Wert): ≤ 55 °C
Mittlere Molmasse: 1900 - 2200
Identität (IR): entspricht

Lagerklassenschlüssel

10 - Combustible liquids

WGK

WGK 1

Flammpunkt (°F)

281.5 °F - closed cup

Flammpunkt (°C)

138.6 °C - closed cup

Analysenzertifikate (COA)

Suchen Sie nach Analysenzertifikate (COA), indem Sie die Lot-/Chargennummer des Produkts eingeben. Lot- und Chargennummern sind auf dem Produktetikett hinter den Wörtern ‘Lot’ oder ‘Batch’ (Lot oder Charge) zu finden.

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Die Dokumentenbibliothek aufrufen

Synthesis of amorphous Fe2O3 nanoparticles by microwave irradiation
Liao Xuehong, et al.
Materials Letters, 50(5-6), 341-346 (2001)
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
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

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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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