Ethylene glycol monohexyl ether

Structural formula
General
Surname	Ethylene glycol monohexyl ether
other names	2- (hexyloxy) ethan-1-ol ( IUPAC ); Hexylcellosolve; n -hexyl glycol; 3-oxa-1-nonanol; 1-hexyloxy-2-hydroxyethane; EGHE; HG;
Molecular formula	C 8 H 18 O 2
Brief description	colorless liquid with a mild odor
External identifiers / databases
EC number	203-951-1
ECHA InfoCard	100.003.592
PubChem	8170
Wikidata	Q27268660
properties
Molar mass	146.23 g mol −1
Physical state	liquid
density	0.89 g cm −3 (20 ° C)
Melting point	−45 ° C
boiling point	208 ° C
Vapor pressure	0.066 h Pa (20 ° C)
solubility	poorly soluble in water (9.460 g l −1 at 20 ° C); Miscible with most organic solvents;
Refractive index	1.4291 (20 ° C)
safety instructions
H and P phrases	H: 302-311-314
	P: 280-305 + 351 + 338-310
Toxicological data	830 mg kg −1 ( LD 50 , rat , oral ) ; 810 mg kg −1 ( LD 50 , rabbit , transdermal ) ;
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C

Ethylene glycol monohexyl ether (according to IUPAC nomenclature: 2- (hexyloxy) ethan-1-ol , also known as hexyl glycol ) is an organic-chemical compound from the group of glycol ethers . It is a high-boiling, low-viscosity solvent that is mainly used in the paint industry .

Extraction and presentation

The industrial production of ethylene glycol monohexyl ether is carried out by a base-catalyzed ethoxylation of 1-hexanol with ethylene oxide .

properties

Physical Properties

Ethylene glycol monohexyl ether has a relative gas density of 5.04 (density ratio to dry air at the same temperature and pressure ) and a relative density of the steam-air mixture of 1.01 (density ratio to dry air at 20 ° C and normal pressure ). In addition, hexyl glycol has a vapor pressure of 0.066 hPa at 20 ° C.

Chemical properties

n -Hexylglycol is a hardly flammable liquid from the group of glycol ethers . It is sparingly soluble in and more easily than water. Hexylglycol is also slightly hygroscopic and has a mild, ethereal odor. Ethylene glycol monohexyl ether can easily form peroxides with oxygen .

use

Hexyl glycol is a widely used solvent in the paint industry . Here it is also particularly useful as a leveling and film-forming aid, as it dissolves many natural and synthetic resins and dyes . Furthermore, it has a good solubility for cellulose nitrate , polyvinyl ethers , polyacrylates , polystyrene , maleinate resins, cyclohexanone resins , urea and melamine-formaldehyde resins , rosin , linseed oil , and most plasticizer . Hexyl glycol is also used in printing inks and cleaning agents.

safety instructions

The vapors of ethylene glycol monohexyl ether can form explosive mixtures with air when heated above the flash point. Hexylglycol is mainly absorbed through the skin as well as very well through the respiratory tract . In addition, absorption from the gastrointestinal tract into the blood can be assumed. In the event of ingestion, eye damage and skin irritation may already occur on contact with diluted solutions . Furthermore, effects on the central nervous system and changes in renal function are possible. Hexylglycol has a lower explosion limit (LEL) of 1.2% by volume and an upper explosion limit (UEL) of approx. 8.4% by volume. With a flash point of 91 ° C, n -hexylglycol is considered flame-retardant.

Web links

Commons : Ethylene Glycol Monohexyl Ether - Collection of Pictures, Videos and Audio Files

Individual evidence

↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ Entry on ethylene glycol monohexyl ether in the GESTIS substance database of the IFA , accessed on February 15, 2019(JavaScript required) .
↑ ^a ^b ^c ^d Entry on hexyl glycol. In: Römpp Online . Georg Thieme Verlag, accessed on February 15, 2019.
↑ Entry on 2-hexoxyethanol in the Hazardous Substances Data Bank , accessed on February 15, 2019.
↑ Entry on 2-hexyloxyethanol in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on February 15, 2019. Manufacturers or distributors can expand the harmonized classification and labeling .

[GESTIS-1] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ Entry on ethylene glycol monohexyl ether in the GESTIS substance database of the IFA , accessed on February 15, 2019(JavaScript required) .

[RÖMPP-2] Entry on hexyl glycol. In: Römpp Online . Georg Thieme Verlag, accessed on February 15, 2019.

[HSDB-3] Entry on 2-hexoxyethanol in the Hazardous Substances Data Bank , accessed on February 15, 2019.

[CLP_100.003.592-4] Entry on 2-hexyloxyethanol in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on February 15, 2019. Manufacturers or distributors can expand the harmonized classification and labeling .