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Polyethylene Glycol PEG 400 Polyglycol - 500ml
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Description
Polyethylene Glycol 400 (PEG 400)
Other Names: Polyglycol, PEG-400, Poly(ethylene oxide), PEG
Chemical Formula: H–(OCH₂CH₂)ₙ–OH (average molecular weight ≈ 380–420 g/mol)
CAS Number: 25322-68-3
Appearance: Clear, colorless to slightly yellow, viscous liquid
Odor: Odorless or faintly sweet
Physical and Chemical Properties
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Average Molecular Weight: ~400 g/mol
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Density: ~1.125 g/cm³ at 20 °C
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Boiling Point: >200 °C (decomposes)
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Melting Point: Typically not defined (liquid at room temperature)
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Solubility in Water: Miscible
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Solubility in Organic Solvents: Miscible with alcohols, acetone, chloroform
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pH (5% aqueous solution): ~4.5–7.5
Applications
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Polymer Chemistry: Used as a plasticizer, dispersant, or intermediate in resin and polymer synthesis
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Lubrication: Employed as a water-soluble lubricant in mechanical and chemical equipment
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Chemical Processing: Functions as a carrier, humectant, and solubilizer in industrial reactions
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Surface Coatings: Improves flow properties and plasticity in surface treatments and paints
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Analytical Use: Used as a molecular weight marker in gel electrophoresis or in chromatography calibration
Safety Information
GHS Classification:
This substance is not classified as hazardous according to the Globally Harmonized System (GHS).
Handling and Storage
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Handling: Avoid contact with eyes. Prevent the formation of aerosols. Handle with appropriate personal protective equipment
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Storage: Store in tightly sealed containers in a cool, dry, well-ventilated area. Protect from light and moisture
Environmental Considerations
PEG 400 is considered to be of low environmental toxicity, but large volumes should not be released into water systems without treatment.