CAS 25322-68-3 corresponds to polyethylene glycol (PEG), a non-ionic linear polymer mixture formed by the condensation of ethylene oxide and water. Its physical state (liquid to solid) and properties vary significantly with different average molecular weights. We produce Polyethylene glycol PEG 200, PEG 400, PEG 600, PEG 800, PEG 1000, PEG 1200, PEG 2000, PEG 4000, PEG 6000, etc.

Core Basic Information
-Chinese name: Polyethylene glycol (alias: polyoxyethylene, polyethylene oxide, oxidized polyethylene)
-English name: Poly (ethylene glycol)/PEG
-General molecular formula: H (OCH ₂ CH ₂) ₙ OH or (C ₂ H ₄ O) ₙ · H ₂ O (n is the degree of polymerization, not a fixed value)
-EINECS number: 200-849-9/203-473-3 (slightly different depending on specific specifications)
-Key feature: This CAS number covers the entire PEG series (such as PEG-200 to PEG-20000+), not a single compound; Low molecular weight (<600) is a viscous liquid at room temperature, while high molecular weight (>600) gradually transforms into a waxy solid; Easy to dissolve in water and most organic solvents, non-toxic, biocompatible, and highly hygroscopic.

Main properties and applications
1. Physical state: Transitions from colorless transparent mucus (PEG 200-400) to white waxy solid (PEG 1000+) according to molecular weight changes; The melting point increases with the increase of molecular weight (approximately -65 ℃ to 60 ℃+).
2. Chemical stability: Good thermal stability, hydrolysis resistance, does not react violently with strong acids and bases, but must not coexist with strong oxidants.
3. Main purpose:
-Pharmaceuticals/Cosmetics: Pharmaceutical excipients (ointment base, suppositories, sustained-release carriers), moisturizers, lubricants, plasticizers.
-Industrial fields: rubber/metal processing lubricants, pesticide dispersants, coating/ink thickeners, textile auxiliaries.
-Research analysis: GPC/SEC molecular weight standards, electrophoresis media, protein precipitants.

Precautions
-Molecular weight identification: In practical applications, specific models (such as PEG 400, PEG 6000) need to be specified, as the viscosity, melting point, and usage of products with different molecular weights are vastly different; The specific specifications cannot be determined solely based on the CAS number.
-Safety: Generally considered low toxicity/non toxicity, high concentration exposure may cause slight irritation, storage should be moisture-proof (hygroscopic) to avoid high temperature decomposition.

Packing
PEG200-1000: Iron or plastic barrel. Net weight 50Kg, 200Kg.
PEG2000-8000: Plastic woven bag lined with plastic bag or compound bag. Net weight 25kg.

Storage
This product does not belong to dangerous chemicals. Store in a cool, dry, ventilated place. Avoid moisture, direct sunlight and collision. Handle with care.

Products :

CAS 25322-68-3 | Poly(ethylene glycol) | Polyethylene glycol PEG200,PEG400,PEG600,PEG800,PEG1000,PEG2000,PEG4000,PEG6000
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