Poly(ethylene glycol)

Catalog Number	ACM25322683-18
CAS	25322-68-3
Structure
Description	PEG 400 (polyethylene glycol 400) is a low-molecular-weight grade of polyethylene glycol. It is a clear, colorless, viscous liquid. Due in part to its low toxicity, PEG 400 is widely used in a variety of pharmaceutical formulations.
Synonyms	PEG
Molecular Weight	7000-9000
Molecular Formula	H(OCH2CH2)nOH
Boiling Point	>250 °C
Melting Point	61-64 °C
Flash Point	171ºC
Purity	99%
Density	1.125
Solubility	Soluble in water (50 mg/mL at 25 °C), clear, colorless
Appearance	Solid
Storage	2-8 °C
EC Number	500-038-2
pH	5.5-7.0 (50 mg/mL in H₂O, 25 °C)
Refractive Index	1.458-1.461

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