8.18897

Polyethylene glycol

20000 (stabilised) for synthesis

• 동의어(들): Poly(ethylene glycol), PEG
• Linear Formula: H(OCH₂CH₂)_nOH
• CAS Number: 25322-68-3
• MDL number: MFCD00081839
• UNSPSC 코드: 13111021
• EC 인덱스 번호: 500-038-2
• NACRES: NA.22

속성

• vapor pressure: <0.01 hPa ( 20 °C)
• Quality Level: 200
• 형태: flakes
• autoignition temp.: >320 °C
• 효능: 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
• 전이 온도: flash point 240 °C
• solubility: 500 g/L
• density: 1.2 g/cm³ at 20 °C
• 벌크 밀도: 400‑500 kg/m³
• 저장 온도: 2-30°C
• SMILES string: C(CO)O
• InChI: 1S/C2H6O2/c3-1-2-4/h3-4H,1-2H2
• InChI key: LYCAIKOWRPUZTN-UHFFFAOYSA-N

설명

애플리케이션

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.

분석 메모

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

안전성 정보

• 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