8.18897

ポリエチレングリコール

20000 (stabilised) for synthesis

• 別名: PEG
• 化学式: H(OCH₂CH₂)_nOH
• CAS番号: 25322-68-3
• MDL番号: MFCD00081839
• UNSPSCコード: 13111021
• EC Index Number: 500-038-2
• NACRES: NA.22

特性

• 蒸気圧: <0.01 hPa ( 20 °C)
• 品質水準: 200
• 形状: flakes
• 自己発火温度: >320 °C
• 有効性: 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
• 転移温度: flash point 240 °C
• 溶解性: 500 g/L
• 密度: 1.2 g/cm³ at 20 °C
• かさ密度: 400‑500 kg/m³
• 保管温度: 2-30°C
• SMILES記法: C(CO)O
• InChI: 1S/C2H6O2/c3-1-2-4/h3-4H,1-2H2
• InChI Key: LYCAIKOWRPUZTN-UHFFFAOYSA-N

詳細

アプリケーション

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.

アナリシスノート

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

安全性情報

• 保管分類コード: 10 - Combustible liquids
• WGK: WGK 1
• 引火点(°F): 281.5 °F - closed cup
• 引火点(℃): 138.6 °C - closed cup