8.18897

Poli(etilenoglicol)

20000 (stabilised) for synthesis

• Sinônimo(s): PEG
• 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

Propriedades

• pressão de vapor: <0.01 hPa ( 20 °C)
• Nível de qualidade: 200
• forma: flakes
• temperatura de autoignição: >320 °C
• potência: 28000 mg/kg LD₅₀, oral (Rat); >20000 mg/kg LD₅₀, skin (Rabbit)
• pH: 5-7 (20 °C, 100 g/L in H₂O)
• pf: 58-63 °C
• temperatura de transição: flash point 240 °C
• solubilidade: 500 g/L
• densidade: 1.2 g/cm³ at 20 °C
• densidade volumétrica: 400‑500 kg/m³
• temperatura de armazenamento: 2-30°C
• cadeia de caracteres SMILES: C(CO)O
• InChI: 1S/C2H6O2/c3-1-2-4/h3-4H,1-2H2
• chave InChI: LYCAIKOWRPUZTN-UHFFFAOYSA-N

Descrição

Aplicação

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.

Nota de análise

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

Informações de segurança

• 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