Ethylenglykolmonoethylether Chemische Eigenschaften,Einsatz,Produktion Methoden
ERSCHEINUNGSBILD
FARBLOSE, ?LIGE FLüSSIGKEIT MIT CHARAKTERISTISCHEM GERUCH.
CHEMISCHE GEFAHREN
Bildung explosionsf?higer Peroxide. Reagiert mit starken Oxidationsmitteln. Feuer und Explosionsgefahr. Greift viele Kunststoffe und Gummi an.
ARBEITSPLATZGRENZWERTE
TLV: 5 ppm (als TWA); Hautresorption; BEI vorhanden; (ACGIH 2005).
MAK: 5 ppm, 19 mg/m? Spitzenbegrenzung: überschreitungsfaktor: II(8); Hautresorption; Schwangerschaft: Gruppe B; (DFG 2005).
AUFNAHMEWEGE
Aufnahme in den K?rper durch Inhalation, über die Haut und durch Verschlucken.
INHALATIONSGEFAHREN
Beim Verdampfen bei 20 °C kann schnell eine gesundheitssch?dliche Kontamination der Luft eintreten.
WIRKUNGEN BEI KURZZEITEXPOSITION
WIRKUNGEN BEI KURZZEITEXPOSITION: Die Substanz reizt leicht die Augen und die Atmungsorgane. M?glich sind Auswirkungen auf Zentralnervensystem, Blut, Knochenmark, Nieren und Leber. Exposition in hohen Konzentrationen kann zu Bewusstlosigkeit führen. ?rztliche Beobachtung notwendig.
WIRKUNGEN NACH WIEDERHOLTER ODER LANGZEITEXPOSITION
Die Flüssigkeit entfettet die Haut. M?glich sind Auswirkungen auf Blutund Knochenmark. Führt zu Blutarmutund Blutzellsch?digungen. Kann fruchtbarkeitssch?digend oder entwicklungssch?digend wirken.
LECKAGE
Belüftung. Zündquellen entfernen. Ausgelaufene Flüssigkeit m?glichst in abdichtbaren Beh?ltern sammeln. Reste mit viel Wasser wegspülen. Pers?nliche Schutzausrüstung: Atemschutzfilter für organische Gase und D?mpfe.
R-S?tze Betriebsanweisung:
R60:Kann die Fortpflanzungsf?higkeit beeintr?chtigen.
R61:Kann das Kind im Mutterleib sch?digen.
R10:Entzündlich.
R20/21/22:Gesundheitssch?dlich beim Einatmen,Verschlucken und Berührung mit der Haut.
S-S?tze Betriebsanweisung:
S53:Exposition vermeiden - vor Gebrauch besondere Anweisungen einholen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn m?glich, dieses Etikett vorzeigen).
Beschreibung
2-Ethoxyethanol is a stable, colorless, flammable liquid,
synthetically produced throughout the world. It belongs to
a larger group of glycol ether solvents. 2-Ethoxyethanol is
commercially referred to as Ethyl Cellosolve or Cellosolve,
a trademark registered by Union Carbide in 1924. It was first
synthesized to have the same chemical properties of both alcohols
and ethers (hydrophilic and lipophilic) but less volatile,
which improves production characteristics. The glycol ethers are
made by reacting anhydrous alcohols with ethylene oxide.
Chemische Eigenschaften
2-Ethoxyethanol is a colorless, viscous liquid
with a sweetish odor
Physikalische Eigenschaften
Clear, colorless liquid with a sweetish odor. Experimentally determined detection and recognition
odor threshold concentrations were 1.1 mg/m
3 (300 ppb
v) and 2.0 mg/m
3 (540 ppb
v), respectively
(Hellman and Small, 1974).
Verwenden
2-Ethoxyethanol is widely used as an industrial solvent and
production intermediate. It is produced by the reaction of
ethylene oxide with ethanol. The glycol ethers are miscible in
polar and nonpolar solutions, which make them useful
solvents in paints and surface coatings, stains, lacquers, inks,
and dyes. Additional uses include industrial deicing,
hydraulic fluids, and cleaning agents. 2-Ethoxyethanol was
once used in cosmetic products but is no longer used due to
toxicity associated with dermal absorption. Global production
has been on the decline in recent years based on
demonstrated toxicity through oral, dermal, and inhalation
routes of exposure. The use of ethylene glycol ethers has
largely been replaced by relatively safer substitutes, primarily
propylene glycol ethers; however, their use as a solvent and
chemical process intermediate poses potential for release into
the environment.
Definition
ChEBI: A hydroxyether that is the ethyl ether derivative of ethylene glycol.
Allgemeine Beschreibung
A clear colorless liquid. Flash point of 120°F. Less dense than water. Its vapors are heavier than air.
Air & Water Reaktionen
Flammable. Water soluble.
Reaktivit?t anzeigen
ETHYLENE GLYCOL MONOMETHYL ETHER may react with oxidizing materials, i.e. hydrogen peroxide, to form peroxides. 2-Ethoxyethanol dissolves many oils, resins and waxes.
Hazard
Toxic by skin absorption. Moderate fire
risk.
Health Hazard
Some eye irritation. Inhalation of vapors causes irritation of nose.
Brandgefahr
Special Hazards of Combustion Products: Toxic gases, such as carbon monoxide, may be produced in fire.
Chemische Reaktivit?t
Reactivity with Water No reaction; Reactivity with Common Materials: No reaction; Stability During Transport: Stable; Neutralizing Agents for Acids and Caustics: Not pertinent; Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.
Sicherheitsprofil
Moderately toxic by
ingestion, skin contact, intravenous, and
intraperitoneal routes. Mildly toxic by
inhalation and subcutaneous routes. An
experimental teratogen. Other experimental
reproductive effects. A mild eye and skin
irritant. Combustible when exposed to heat
or flame; can react with oxidzing materials.
Moderate explosion hazard in the form of
vapor when exposed to heat or flame.
Mxture with hydrogen peroxide +
polyacrylamide gel + toluene is explosive
when dry. To fight fire, use alcohol foam,
dry chemical. See also GLYCOL ETHERS.
m?gliche Exposition
This material is used as a solvent for
nitrocellulose and alkyd resins in lacquers; as a solvent for
printing inks; in dyeing leathers and textiles; in the formulation of cleaners and varnish removers; as an anti-icing
additive in brake fluids and auto and aviation fuels.
Environmental Fate
Biological. Bridié et al. (1979) reported BOD and COD values of 1.03 and 1.92 g/g using
filtered effluent from a biological sanitary waste treatment plant. These values were determined
using a standard dilution method at 20 °C for a period of 5 d. When a sewage seed was used in a
separate screening test, a BOD value of 1.27 g/g was obtained. Similarly, Heukelekian and Rand
(1955) reported a 5-d BOD value of 1.42 g/g which is 72.4% of the ThOD value of 1.96 g/g.
Photolytic. Grosjean (1997) reported a rate constant of 1.87 x 10
-11 cm
3/molecule?sec at 298 K
for the reaction of 2-ethoxyethanol and OH radicals in the atmosphere. Based on an atmospheric
OH radical concentration of 1.0 x 106 molecule/cm
3, the reported half-life of methanol is 0.35 d
(Grosjean, 1997). Stemmler et al. (1996) reported a rate constant of 1.66 x 10
-11 cm
3/molecule?sec
for the OH radical-initiated oxidation of 2-ethoxyethanol in synthetic air at 297 K and 750 mmHg.
Major reaction products identified by GC/MS (with their yields) were ethyl formate, 34%;
ethylene glycol monoformate, 36%; ethylene glycol monoacetate, 7.8%; and ethoxyacetaldehyde,
24%.
Chemical/Physical. 2-Ethoxyethanol will not hydrolyze (Kollig, 1993).
At an influent concentration of 1,024 mg/L, treatment with GAC resulted in an effluent
concentration of 886 mg/L. The adsorbability of the carbon used was 28 mg/g carbon (Guisti et
al., 1974).
Versand/Shipping
UN1171 Ethylene glycol monoethyl ether,
Hazard Class: 3; Labels: 3-Flammable liquid.
l?uterung methode
Dry it with CaSO4 or K2CO3, filter and fractionally distil it. Peroxides can be removed by refluxing with anhydrous SnCl2 or by filtration under slight pressure through a column of activated alumina. [Beilstein 1 IV 2377.]
Inkompatibilit?ten
May form explosive mixture with air.
Strong oxidizers may cause fire and explosions. Attacks
some plastics, rubber and coatings. Able to form peroxides. Incompatible with strong acids; aluminum and its
alloys
Waste disposal
Dissolve or mix the material
with a combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber. All federal,
state, and local environmental regulations must be
observed. Consult with environmental regulatory agencies
for guidance on acceptable disposal practices. Generators of
waste containing this contaminant (≧100 kg/mo) must conform with EPA regulations governing storage, transportation,
treatment, and waste disposal
Ethylenglykolmonoethylether Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
