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Merck

8.18897

Poly(éthylène glycol)

greener alternative

20000 (stabilised) for synthesis

Synonyme(s) :

PEG

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Date d'expédition estimée le01 décembre 2025Détails

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A propos de cet article

Formule linéaire :
H(OCH2CH2)nOH
Numéro CAS:
25322-68-3
Numéro MDL:
MFCD00081839
Code UNSPSC :
13111021
Numéro de classement CE :
500-038-2
Nomenclature NACRES :
NA.22

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Pression de vapeur

<0.01 hPa ( 20 °C)

Niveau de qualité

200

Forme

flakes

Température d'inflammation spontanée

>320 °C

Puissance

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

Caractéristiques du produit alternatif plus écologique

Safer Solvents and Auxiliaries
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sustainability

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pH

5-7 (20 °C, 100 g/L in H2O)

Pf

58-63 °C

Température de transition

flash point 240 °C

Solubilité

500 g/L

Densité

1.2 g/cm3 at 20 °C

Masse volumique apparente

400‑500 kg/m3

Autre catégorie plus écologique

Aligned

Température de stockage

2-30°C

Chaîne SMILES 

C(CO)O

InChI

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

Clé InChI

LYCAIKOWRPUZTN-UHFFFAOYSA-N

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Cet article
8.190158.074888.07490
Poly(éthylène glycol) 20000 (stabilised) for synthesis

Sigma-Aldrich

8.18897

Poly(éthylène glycol)

Poly(éthylène glycol) 3000, for synthesis

Sigma-Aldrich

8.19015

Poly(éthylène glycol)

Poly(éthylène glycol) 1000, for synthesis

Sigma-Aldrich

8.07488

Poly(éthylène glycol)

Poly(éthylène glycol) 4000, for synthesis

Sigma-Aldrich

8.07490

Poly(éthylène glycol)

form

flakes

form

liquid

form

liquid

form

solid

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

200

storage temp.

2-30°C

storage temp.

2-30°C

storage temp.

2-30°C

storage temp.

2-30°C

density

1.2 g/cm3 at 20 °C

density

1.21 g/cm3 at 20 °C

density

1.2 g/cm3 at 20 °C

density

1.2 g/cm3 at 20 °C

mp

58-63 °C

mp

55-58 °C

mp

33-40 °C

mp

53-58 °C

vapor pressure

<0.01 hPa ( 20 °C)

vapor pressure

<0.1 hPa ( 20 °C)

vapor pressure

<0.1 hPa ( 20 °C)

vapor pressure

<0.01 hPa ( 20 °C)

Description générale

We are committed to bringing you Greener Alternative Products, which adhere to one or more of The 12 Principles of Green Chemistry. Polyethylene glycol (PEG) is an eco-friendly, biodegradable polymer widely used in pharmaceuticals and cosmetics. Its non-toxic nature and versatility make it a sustainable choice, derived from renewable resources, contributing to greener product formulations. Click here for more information.

Application

Polyethylene glycol 20000 (PEG-20000) can be used as a pore-expanding agent to prepare mesoporous La2O3 catalyst via hydrothermal process. The effect of PEG 20000 on La2O3 catalyst particles, results in increased alkalinity, crystallinity, specific surface area, and dispersion. These modifications of the catalyst improve the catalytic performance in the transesterification of dimethyl carbonate with glycerol.[1]
It can also be used as:
  • A surfactant in the synthesis of nanomaterials by various methods to control the size and morphology of nanostructure.[2][3]
  • A support to prepare zero-valent iron-PEG nanocomposite material (Fe/PEG) applicable in the removal of Pb(II) from aqueous solutions.[4]

Remarque sur l'analyse

Melting range (lower value): ≥ 62 °C
Melting range (upper value): ≤ 66 °C
Hydroxyl value: 4 - 7
Average molecular mass: 16000 - 28000

Code de la classe de stockage

10 - Combustible liquids

Classe de danger pour l'eau (WGK)

WGK 1

Point d'éclair (°F)

281.5 °F - closed cup

Point d'éclair (°C)

138.6 °C - closed cup

Certificats d'analyse (COA)

Recherchez un Certificats d'analyse (COA) en saisissant le numéro de lot du produit. Les numéros de lot figurent sur l'étiquette du produit après les mots "Lot" ou "Batch".

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Retrouvez la documentation relative aux produits que vous avez récemment achetés dans la Bibliothèque de documents.

Consulter la Bibliothèque de documents

Hydrothermal synthesis of hexagonal magnesium hydroxide nanoflakes
Wang Qiang, et al.
Materials Research Bulletin, 51, 35-39 (2014)
Microwave-assisted rapid synthesis of γ-cyclodextrin metal-organic frameworks for size control and efficient drug loading
Liu Botao, et al.
Crystal Growth & Design, 17(4), 1654-1660 (2017)
Polyethylene Glycol 20000-Supported Zero-Valent Iron Nanoparticle for Removal of Pb (II) from Aqueous Solutions: Characteristics, Kinetic and Thermodynamic Studies
He Qi, et al.
Science of Advanced Materials, 8(10), 1878-1886 (2016)
Monodisperse mesoporous La2O3 flakes for the synthesis of glycerol carbonate by efficiently catalyzing the transesterification of dimethyl carbonate with glycerol
Yue Chengguang, et al.
Reaction Kinetics, Mechanisms and Catalysis, 128(2), 763-778 (2019)

Questions

1–2 of 2 Questions  

  1. 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/418/501/product-dating-information-06-25-mk.pdf

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  2. 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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