Diethylene glycol

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A colorless, thick, Hygroscopic liquid that is used as a finishing agent for fabrics (Wool, Cotton, rayon, and Silk), tobacco, Leather, sponges, paper products, and Cork. As a finishing agent, diethylene glycol prevents materials from drying out and becoming stiff or hard. Diethylene glycol is used as a Lubricant, Plasticizer, Surfactant, and Solvent in many types of polymers, adhesives, varnishes, paints, inks, and dyes.

See also Ethylene glycol

Synonyms and Related Terms

2,2'-oxybisethanol; dihydroxydiethyl ether; diglycol; DEG; oxydiethanol


  • Toxic by ingestion. Skin contact may cause redness.
  • Reacts strongly with oxidants.
  • Combustible. Flash point = 124C
  • ThermoFisher: SDS

Physical and Chemical Properties

Miscible with water, ethanol, ether, acetone, ethylene glycol. Insoluble in benzene, toluene and carbon tetrachloride.

Composition C4H10O3
CAS 111-46-6
Melting Point -6.5 C
Density 1.118 g/ml
Molecular Weight mol. wt. = 106.1
Refractive Index 1.445
Boiling Point 244-245 C


Properties of Common Solvents

Resources and Citations

  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 303
  • Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
  • Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979 Comment: flash point = 140C
  • Matt Roberts, Don Etherington, Bookbinding and the Conservation of Books: a Dictionary of Descriptive Terminology, U.S. Government Printing Office, Washington DC, 1982
  • The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983
  • Photographic chemicals:
  • CRC Handbook of Chemistry and Physics, Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: ref. index= 1.445

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