8.18897

Polyethylenglykol

20000 (stabilised) for synthesis

• Synonym(e): Poly(ethylenglykol), PEG
• 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

Eigenschaften

• Dampfdruck: <0.01 hPa ( 20 °C)
• Qualitätsniveau: 200
• Form: flakes
• Selbstzündungstemp.: >320 °C
• Wirksamkeit: 28000 mg/kg LD₅₀, oral (Rat); >20000 mg/kg LD₅₀, skin (Rabbit)
• pH-Wert: 5-7 (20 °C, 100 g/L in H₂O)
• mp (Schmelzpunkt): 58-63 °C
• Übergangstemp.: flash point 240 °C
• Löslichkeit: 500 g/L
• Dichte: 1.2 g/cm³ at 20 °C
• Schüttdichte: 400‑500 kg/m³
• Lagertemp.: 2-30°C
• SMILES String: C(CO)O
• InChI: 1S/C2H6O2/c3-1-2-4/h3-4H,1-2H2
• InChIKey: LYCAIKOWRPUZTN-UHFFFAOYSA-N

Beschreibung

Anwendung

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]

Hinweis zur Analyse

Schmelzbereich (unterer Wert): ≥ 62 °C
Schmelzbereich (oberer Wert): ≤ 66 °C
Hydroxylzahl: 4 - 7
Mittlere Molmasse: 16000 - 28000

Sicherheitshinweise

• Lagerklassenschlüssel: 10 - Combustible liquids
• WGK: WGK 1
• Flammpunkt (°F): 281.5 °F - closed cup
• Flammpunkt (°C): 138.6 °C - closed cup