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8.18897

Sigma-Aldrich

Polyethylene glycol

20000 (stabilised) for synthesis

Synonym(s):

Poly(ethylene glycol), PEG

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About This Item

Linear Formula:
H(OCH2CH2)nOH
CAS Number:
25322-68-3
MDL number:
MFCD00081839
UNSPSC Code:
13111021
EC Index Number:
500-038-2
NACRES:
NA.22

vapor pressure

<0.01 hPa ( 20 °C)

Quality Level

200

form

flakes

autoignition temp.

>320 °C

potency

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

pH

5-7 (20 °C, 100 g/L in H2O)

mp

58-63 °C

transition temp

flash point 240 °C

solubility

500 g/L

density

1.2 g/cm3 at 20 °C

bulk density

400‑500 kg/m3

storage temp.

2-30°C

SMILES string

C(CO)O

InChI

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

InChI key

LYCAIKOWRPUZTN-UHFFFAOYSA-N

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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.
It can also be used as:
  • A surfactant in the synthesis of nanomaterials by various methods to control the size and morphology of nanostructure.
  • A support to prepare zero-valent iron-PEG nanocomposite material (Fe/PEG) applicable in the removal of Pb(II) from aqueous solutions.

Analysis Note

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

Storage Class Code

10 - Combustible liquids

WGK

WGK 1

Flash Point(F)

281.5 °F - closed cup

Flash Point(C)

138.6 °C - closed cup

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Hydrothermal synthesis of hexagonal magnesium hydroxide nanoflakes
Wang Qiang, et al.
Materials Research Bulletin, 51, 35-39 (2014)
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)
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)
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)

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