Misplaced Pages

PEG 400

Article snapshot taken from Wikipedia with creative commons attribution-sharealike license. Give it a read and then ask your questions in the chat. We can research this topic together.
This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these messages)
This article has an unclear citation style. The references used may be made clearer with a different or consistent style of citation and footnoting. (November 2019) (Learn how and when to remove this message)
This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. Please help improve this article by introducing more precise citations. (November 2019) (Learn how and when to remove this message)
(Learn how and when to remove this message)
Polyethylene glycol
Polyethylene glycol
Names
IUPAC name Polyethylene glycol
Identifiers
CAS Number
ChemSpider
  • none
UNII
Properties
Chemical formula C2nH4n+2On+1, n = 8.2 to 9.1
Molar mass 380-420 g/mol
Density 1.128 g/cm
Melting point 4 to 8 °C (39 to 46 °F; 277 to 281 K)
Viscosity 90.0 cSt at 25 °C, 7.3 cSt at 99 °C
Hazards
Flash point 238 °C (460 °F; 511 K)
Lethal dose or concentration (LD, LC):
LD50 (median dose) 30 mL/kg, orally in rats
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). ☒N verify (what is  ?) Infobox references
Chemical compound

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.

Chemical properties

PEG 400 is strongly hydrophilic. The partition coefficient of PEG 400 between hexane and water is 0.000015 (log P = − 4.8 {\displaystyle P=-4.8} ), indicating that when PEG 400 is mixed with water and hexane, there are only 15 parts of PEG400 in the hexane layer per 1 million parts of PEG 400 in the water layer.

PEG 400 is soluble in water, acetone, alcohols, benzene, glycerin, glycols, and aromatic hydrocarbons. It is not miscible with aliphatic hydrocarbons nor diethyl ether. Therefore, reaction products can be extracted from the reaction media with those solvents.

References

  1. T. Y. Ma; D. Hollander; P. Krugliak; K. Katz (1990). "PEG 400, a hydrophilic molecular probe for measuring intestinal permeability". Gastroenterology. 98 (1): 39–46. doi:10.1016/0016-5085(90)91288-h. PMID 2293598.
  • The Merck Index, 11th Edition
  • Handbook of Pharmaceutical Excipients
Category: