1,2-Dichlorethan Chemische Eigenschaften,Einsatz,Produktion Methoden
ERSCHEINUNGSBILD
FARBLOSE VISKOSE FLüSSIGKEIT MIT CHARAKTERISTISCHEM GERUCH. VERFäRBT SICH DUNKEL BEI KONTAKT MIT LUFT, FEUCHTIGKEIT UND LICHT.
PHYSIKALISCHE GEFAHREN
Die Dämpfe sind schwerer als Luft und können sich am Boden ausbreiten. Fernzündung möglich. Fließen, Schütten o.ä. kann zu elektrostatischer Aufladung führen.
CHEMISCHE GEFAHREN
Zersetzung beim Erhitzen und Verbrennen unter Bildung giftiger und ätzender Rauche mit Chlorwasserstoff (ICSC 0163) und Phosgen (ICSC 0007). Reagiert sehr heftig mit Aluminium, Alkalimetallen, Alkaliamiden, Ammoniak, Basen und starken Oxidationsmitteln. Greift viele Metalle in Gegenwart von Wasser an. Greift Kunststoff an.
ARBEITSPLATZGRENZWERTE
TLV: 10 ppm (als TWA); Krebskategorie A4 (nicht klassifizierbar als krebserzeugend für den Menschen); (ACGIH 2005).
MAK: Hautresorption; Krebserzeugend Kategorie 2; (DFG 2005).
AUFNAHMEWEGE
Aufnahme in den Körper durch Inhalation der Dämpfe, über die Haut und durch Verschlucken.
INHALATIONSGEFAHREN
Beim Verdampfen bei 20°C kann sehr schnell eine gesundheitsschädliche Kontamination der Luft eintreten.
WIRKUNGEN BEI KURZZEITEXPOSITION
WIRKUNGEN BEI KURZZEITEXPOSITION: Der Dampf reizt die Augen, die Haut und die Atemwege. Inhalation des Dampfes kann zu Lungenödem führen (s.Anm.). Möglich sind Auswirkungen auf Zentralnervensystem, Nieren und Leber mit nachfolgenden Funktionsstörungen.
WIRKUNGEN NACH WIEDERHOLTER ODER LANGZEITEXPOSITION
Wiederholter oder andauernder Hautkontakt kann Dermatitis hervorrufen. Wahrscheinlich krebserzeugend für den Menschen.
LECKAGE
Gefahrenbereich verlassen! Ausgelaufene Flüssigkeit möglichst in abdichtbaren Behältern sammeln. Reste mit Sand oder inertem Absorptionsmittel aufnehmen und an einen sicheren Ort bringen. NICHT in die Kanalisation spülen. Persönliche Schutzausrüstung: Umgebungsluftunabhängiges Atemschutzgerät.
R-Sätze Betriebsanweisung:
R45:Kann Krebs erzeugen.
R11:Leichtentzündlich.
R22:Gesundheitsschädlich beim Verschlucken.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
R23/25:Giftig beim Einatmen und Verschlucken.
S-Sätze Betriebsanweisung:
S53:Exposition vermeiden - vor Gebrauch besondere Anweisungen einholen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
S24:Berührung mit der Haut vermeiden.
S16:Von Zündquellen fernhalten - Nicht rauchen.
S7:Behälter dicht geschlossen halten.
Aussehen Eigenschaften
C2H4Cl2. Farblose, ölige Flüssigkeit mit chloroformartigem Geruch.
Gefahren für Mensch und Umwelt
Leichtentzündlich. Im Brandfall Bildung gefährlicher Gase. Bei Reaktion mit Leichtmetallen besteht Explosionsgefahr.
Reizt die Augen, Atmungsorgane und die Haut. Aufnahme über die Haut möglich. Gesundheitsschädlich beim Verschlucken. Wirkt narkotisch, verursacht Herz- und Kreislaufstörungen und wirkt toxisch auf Leber und Nieren.
Kann Krebs erzeugen.
Stark wassergefährdender Stoff (WGK 3).
Schutzmaßnahmen und Verhaltensregeln
Von Zündquellen fernhalten - Nicht rauchen.
Maßnahmen gegen elektrostatische Aufladung treffen.
Latex- und Neopren-Schutzhandschuhe sind
nicht beständig gegen 1,2-Dichlorethan. Höchstens kurzzeitig als Spritzschutz verwenden.
Verhalten im Gefahrfall
Kleinstmengen im Abzug verdampfen lassen. Verschüttete größere Mengen mit Absorptionsmaterial (Rench-Rapid) aufnehmen und als Sondermüll entsorgen..
Brände mit CO
2-Löscher bekämpfen.
Atemschutz: Kombinationsfilter ABEK.
Erste Hilfe
Nach Hautkontakt: Mit viel Wasser und Seife abwaschen.
Nach Augenkontakt: Mit viel Wasser mindestens 15 Minuten bei geöffnetem Augenlid spülen. Augenarzt!
Nach Einatmen: Frischluft. Arzt!
Nach Verschlucken: Paraffinöl(3 ml/kg Körpergewicht) trinken lassen. Keine Milch, kein Rhizinusöl. Sofort Arzt hinzuziehen.
Nach Kleidungskontakt: Kontaminierte Kleidung sofort ausziehen.
Ersthelfer: siehe gesonderten Anschlag
Sachgerechte Entsorgung
Als Sondermüll (halogenhaltige Lösungsmittel) entsorgen.
Beschreibung
1,2-Dichloroethane, also called ethylene dichloride (EDC), is a manufactured chemical that is not found naturally in the environment. It is used principally to synthesize vinyl chloride, which is further used to produce a variety of vinyl based plastics products, such as polyvinyl chloride (PVC) pipes, furniture, automobile upholstery, wall coverings, housewares, and automobile parts. It is used in solvents in closed systems for various extraction and cleaning purposes in organic synthesis. It is used as a leaded gasoline additive to remove lead, but with declining tendency. It is used as a dispersant in rubber and plastics, as a wetting and penetrating agent. It was used in ore flotation, as a metal degreaser, and in textile and PVC cleaning. It was also used as an insect fumigant for stored grains and in mushroom houses, a soil fumigant in peach and apple orchards. But due to its toxicity, it is no longer registered for use as an insect fumigant in the United States (IARC 1999).
1,2-Dichloroethane structure
Chemische Eigenschaften
1,2-Dichloroethane is a clear and colorless, flammable liquid which has a pleasant, chloroform-like odor, and a sweetish taste. Decomposes slowly: turns dark and acidic on contact with air, moisture, and light. The Odor Threshold is 100 ppm.It is a volatile compound. It is relatively insoluble in water (8.6 × 103 mg/l at 25 °C) but soluble in various organic solvents and is miscible with alcohol, chloroform, and ether (NLM, 2013). 1,2-Dichloroethane is one of the highest volume chemicals used in the United States. It is also used as an extraction solvent, as a solvent for textile cleaning and metal degreasing, in certain adhesives, and as a component in fumigants for upholstery, carpets, and grain.
Physikalische Eigenschaften
Clear, colorless, oily liquid with a pleasant, chloroform-like odor. The average least detectable
odor threshold concentrations in water at 60 °C and in air at 40 °C were 12 and 52 mg/L,
respectively (Alexander et al., 1982). Experimentally determined detection and recognition odor
threshold concentrations were 25 mg/m
3 (6 ppm
v) and 165 mg/m
3 (41 ppm
v), respectively
(Hellman and Small, 1974).
Verwenden
1,2-Dichloroethane is used in the manufacture of acetyl cellulose and vinyl chloride; inpaint removers; as a fumigant; as a degreaser;as a wetting agent; and as a solvent for oils,waxes, gums, resins, and rubber. It has been used as insect and soil fumigant.
Application
1,2-dichloroethane (Ethylene dichloride), also known as EDC, is produced by reacting chlorine or anhydrous hydrochloric acid with ethylene. The largest single use for EDC is the production of vinyl chloride monomer, which is used to produce poly vinyl chloride (PVC). It has many uses in industry, with principal ones being the following:
As an intermediate in the manufacture of methyl chloroform, perchloroethylene, ethylene amines, polyvinyl chloride (PVC), sulfide compounds, vinyl chloride, and trichloroethane.
As an additive in gasoline (used as a lead scavenger), pharmaceutical products, color film, and pesticides.
As a solvent for rubber, tobacco extract, paint, printing inks, and varnish.
Miscellaneous uses include as an ingredient in fingernail polish, for metal degreasing, in extracting spices, and as a dry cleaning agent.
Definition
ChEBI: 1,2-dichloroethane is a member of the class of chloroethanes substituted by two chloro groups at positions 1 and 2. It has a role as a non-polar solvent, a hepatotoxic agent and a mutagen.
synthetische
The first synthesis of 1,2-dichloroethane was achieved in 1795. 1,2-Dichloroethane is industrially produced by chlorination of ethylene. This chlorination can either be carried out by using chlorine (direct chlorination) or hydrogen chloride (oxychlorination) as a chlorinating agent. It is also produced by oxychlorination—ethylene, hydrogen chloride, and air are reacted at about 250 °C with a copper chloride catalyst. In the United States, almost all ethylene dichloride produced at present is used as the starting material for preparation of vinyl chloride monomer.
Allgemeine Beschreibung
Ethylene Dichloride is a clear colorless liquid with a pleasant chloroform-like smell that emits toxic fumes of hydrochloric acid when heated to decomposition. Denser than water and insoluble in water. Vapors are heavier than air. Density 10.4 lb/gal. It is primarily used to produce vinyl chloride. Inhalation exposure to this substance induces respiratory distress, nausea and vomiting and affects the central nervous system, liver and kidneys. It is mutagenic in animals and is reasonably anticipated to be a human carcinogen. (NCI05)
Air & Water Reaktionen
Highly flammable. Slightly water soluble.
Reaktivität anzeigen
Liquid ammonia and 1,2-Dichloroethane can cause an explosion when mixed, NFPA 491M, 1991. A tank of dimethyl amino propyl amine exploded violently when 1,2-Dichloroethane reacted with wet 1,2-Dichloroethane which had been the tank's previous contents [Doyle 1973]. Halogenated aliphatic compounds, such as 1,2-Dichloroethane , are moderately or very reactive. Reactivity generally decreases with increased degree of substitution of halogen for hydrogen atoms. Materials in this group are incompatible with strong oxidizing and reducing agents. Also, they are incompatible with many amines, nitrides, azo/diazo compounds, alkali metals, epoxides, aluminum
Hazard
Toxic by ingestion, inhalation, and skin
absorption; strong irritant to eyes and skin; a carcinogen. Flammable, dangerous fire risk, explosive
limits in air 6–16%. Possible carcinogen.
Health Hazard
The toxic symptoms from exposure to 1,2-dichloroethane include depression of the cen tral nervous system, irritation of the eyes,corneal opacity, nausea, vomiting, diarrhea,ulceration, somnolence, cyanosis, pulmonaryedema, and coma. Repeated exposure mayproduce injury to the kidney and liver. Inges tion of the liquid can cause death. A fataldose in humans may range between 30 and50 mL. The liquid is an irritant to the skinand damaging to the eyes.
LC50 value, inhalation (rats): 1000 ppm/7 hLD50 value, oral (rabbits): 860 mg/kg
1,2-Dichloroethane tested positive to thehistidine reversion–Ames test and othermutagenic tests. The compound is carcino genic to animals. Inhalation or oral adminis tration caused lung, gastrointestinal, and skincancers in mice and rats.
Brandgefahr
Flammable liquid; burns with a smoky flame;
flash point (closed cup) 13°C (56°F), (open
cup) 18°C (65°F); vapor pressure 62 torr at
20°C (68°F); the vapor is heavier than air and
can travel a considerable distance to a source
of ignition and flash back; autoignition tem perature 413°C (775°F); fire-extinguishing
agent: dry chemical, CO2, or foam; water
may be used to keep fire-exposed contain ers cool and to disperse the vapors and flush
away any spill.
1,2-Dichloroethane forms explosive mix tures with air, with LEL and UEL val ues of 6.2% and 16.0% by volume in air,
respectively. Its reactions with alkali met als, powdered aluminum, or magnesium can
be violent. It forms explosive mixtures with
nitrogen tetroxide.
Handelsname
BORER SOL®; BROCIDE®; DESTRUXOL
BORER-SOL®; DOWFUME®[C]; DUTCH LIQUID®;
DUTCH OIL®
Sicherheitsprofil
Confirmed carcinogen with experimental carcinogenic, neoplastigenic, and tumorigenic data. An experimental transplacental carcinogen. A human poison by ingestion. Poison experimentally by intravenous and subcutaneous routes. Moderately toxic by inhalation, skin contact, and intraperitoneal routes. Human systemic effects by ingestion and inhalation: flaccid paralysis without anesthesia (usually neuromuscular blockage), somnolence, cough, jaundce, nausea or vomiting, hypermoulity, diarrhea, ulceration or bleeding from the stomach, fatty liver degeneration, change in cardiac rate, cyanosis, and coma. It may also cause dermatitis, edema of the lungs, toxic effects on the kidneys, and severe corneal effects. A strong narcotic. Experimental teratogenic and reproductive effects. A skin and severe eye irritant, and strong local irritant. Its smell and irritant effects warn of its presence at relatively safe concentrations. Human mutation data reported.
mögliche Exposition
In recent years, 1,2-dichloroethane is
used in the production of vinyl chloride and as a leadscavenging agent in petrol; it has found wide use in the
manufacture of ethylene glycol, diaminoethylene, polyvinyl
chloride; nylon, viscose rayon; styrenebutadiene rubber,
and various plastics. It is a solvent for resins, asphalt, bitumen, rubber, cellulose acetate; cellulose ester; and paint; a
degreaser in the engineering, textile, and petroleum industries; and an extracting agent for soybean oil and caffeine.
It is also used as an antiknock agent in gasoline; a pickling
agent; a fumigant; and a dry-cleaning agent. It has found
use in photography, xerography, and water softening; and
also in the production of adhesives, cosmetics, pharmaceuticals, and varnishes.
Carcinogenicity
1,2-Dichloroethane is reasonably anticipated to be a human carcinogen based on sufficient evidence of carcinogenicity from studies in experimental animals.
Environmental Fate
Biological. Methanococcus thermolithotrophicus, Methanococcus deltae, and
Methanobacterium thermoautotrophicum metabolized 1,2-dichloroethane releasing methane and
ethylene (Belay and Daniels, 1987). 1,2-Dichloroethane showed slow to moderate biodegradative
activity with concomitant rate of volatilization in a static-culture flask-screening test (settled
domestic wastewater inoculum) conducted at 25 °C. At concentrations of 5 and 10 mg/L, percent
losses after 4 wk of incubation were 63 and 53, respectively. At a substrate concentration of 5
mg/L, 27% was lost due to volatilization after 10 d (Tabak et al., 1981).
Photolytic. Titanium dioxide suspended in an aqueous solution and irradiated with UV light (λ
= 365 nm) converted 1,2-dichloroethane to carbon dioxide at a significant rate (Matthews, 1986).
The rate constant for the reaction of 1,2-dichloroethane and OH radicals in the atmosphere at
300 K is 1.3 x 10
-11 cm
3/molecule?sec (Hendry and Kenley, 1979). At 296 K, a photooxidation rate
constant of 2.2 x 10
-13 cm
3/molecule?sec was reported for the reaction with OH radicals resulting
in a half-life of 1.7 months (Howard and Evenson, 1976).
Chemical/Physical. Anticipated products from the reaction of 1,2-dichloroethane with ozone or
OH radicals in the atmosphere are chloroacetaldehyde, chloroacetyl chloride, formaldehyde, and
ClHCHO (Cupitt, 1980).
Stoffwechselwegen
Resting cell suspensions of the soil methylotroph
Methylosinus trichosporium OB-3b rapidly
dehalogenate 1,2-dichloroethane, resulting in the
formation of chloroethanol via direct hydroxylation of
one of the C-Cl bonds, and this ethanol is rapidly
oxidized to yield chloroacetic acid.
Lager
Ethylene dichloride should be kept protected against physical damage. Store in a cool,
dry, well-ventilated location, away from any area where the fi re hazard may be acute.
Outside or detached storage is preferred. Separate from incompatibles. Containers should
be bonded and grounded for transfer to avoid static sparks.
Versand/Shipping
UN1184 Ethylene dichloride, Hazard Class: 3;
Labels: 3-Flammable liquid, 6.1-Poisonous materials. Note:
United States DOT 49CFR172.101, Inhalation Hazardous
Chemical as 1,2-Dichloroethane
läuterung methode
It is usually prepared by chlorinating ethylene, so that likely impurities include higher chloro derivatives and other chloro compounds depending on the impurities originally present in the ethylene. It forms azeotropes with water, MeOH, EtOH, trichloroethylene, CCl4 and isopropanol. Its azeotrope with water (containing 8.9% water, and b 77o) can be used to remove gross amounts of water prior to final drying. As a preliminary purification step, it can be steam distilled, and the lower layer is treated as below. Shake it with conc H2SO4 (to remove alcohol added as an oxidation inhibitor), wash with water, then dilute KOH or aqueous Na2CO3 and again with water. After an initial drying with CaCl2, MgSO4 or by distillation, it is refluxed with P2O5, CaSO4 or CaH2 and fractionally distilled. Carbonyl-containing impurities can be removed as described for chloroform. [Beilstein 1 IV 131.]
Toxicity evaluation
The estimated daily intake of 1,2-dichloroethane was similar for each rat strain at each dose level. Rats administered drinking water containing 8,000 ppm 1,2-dichloroethane received an esti mated intake of about 500-725 mg/kg per day. This estimated daily intake is close to the report ed oral LDso for 1,2-dichloroethane adminis tered by gavage (680-850 mg/kg) (McCollister et al., 1956); however, intake of this dose over 24 hours rather than as a bolus resulted in little toxicity.
1,2-Dichloroethane toxicity administered by gavage or in formulated drinking water was compared in F344/N rats. Gavage doses were calculated to be approximately equivalent (in milligrams per kilogram) to the range of expo sures resulting from the formulated water mix tures. The F344/N rats were more sensitive to 1,2-dichloroethane administered by gavage than in drinking water, as evidenced by the fact that all males receiving 240 and 480 mg/kg and 9/10 females receiving 300 mg/kg died before the end of the studies.
Toxic encephalopathy is the most common and serious disorder resulting from DCE intoxication.
Inkompatibilitäten
May form explosive mixture with air.
Reacts violently with strong oxidizers and caustics;
chemically active metals, such as magnesium or aluminum powder, sodium and potassium; alkali metals;
alkali amides; liquid ammonia. Decomposes to
vinyl chloride and HCl above 600℃. Attacks plastics,
rubber, coatings. Attacks many metals in presence of
water.
Waste disposal
Incineration, preferably after
mixing with another combustible fuel. Care must be exercised to assure complete combustion to prevent the formation of phosgene. An acid scrubber is necessary to remove
the halo acids produced
Vorsichtsmaßnahmen
Occupational workers should avoid use of ethylene dichloride along with oxidizing agents,
strong alkalis, strong caustics, magnesium, sodium, potassium, active amines, ammonia List of Chemical Substances
1,2-Dichlorethan Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
sulfonic ion exchange membrane based on polypropylene/poly (ST-DVB)
N,N-Bis(2-aminoethyl)ethylendiamin
1-(5-BROMO-1-BENZOTHIEN-3-YL)ETHANONE
5-CHLORO-BENZO[B]THIOPHENE-3-CARBOXYLIC ACID
3-AMINO-4-METHOXYPYRIDINE
Dazoxiben
5-(CHLOROMETHYL)-2-(TRIFLUOROMETHYL)THIAZOLE
1-Acetylpiperidin-4-carbonylchlorid
(5-BROMO-3-BENZO[B]THIENYL)METHANOL
PHENYL(PIPERIDIN-4-YL)METHANONE
2,6-DICHLORO-(2-CHLOROETHOXY)BENZENE
7-HYDROXYISOFLAVONE
1-(5-CHLOROBENZO[B]THIOPHEN-3-YL)ETHANONE
1-ACETYL-4-BENZOYLPIPERIDINE
Chlorethylen
2-TRIFLUOROMETHYLQUINOLINE-7-CARBOXYLIC ACID
2-(2,6-Dichlorophenoxy)ethylhydrazine
1,2-Bis(diphenylphosphino)ethane nickel(II) chloride
4-Bromo-1-chloroisoquinoline
Nitrocyclohexan
Paclobutrazol
(5-CHLORO-1-BENZOTHIOPHEN-3-YL)METHANOL
5-BROMOBENZO[B]THIOPHENE-3-CARBOXYLIC ACID
(S)-(-)-2,2'-Bis(diphenylphosphino)-1,1'-binaphthyl
Acephat (ISO)
Dimethyl(2-phenoxyethyl)amin
1,5-Diazobicyclo[4.3.0]non-5-en
1,1-Dichlorethan
Chloracetylisocyanat
1,1,2-Trichlorethan
3-Amino-5-fluoropyridine
3,6-Diazaoctan-1,8-diamin
1-Boc-4-Methylaminopiperidine
METHYL CYCLOHEXANEACETATE
3-(THIOPHEN-2-YL)ISOXAZOL-5-AMINE
6-O-Benzylguanine
Pyrrol-2-carbonsure
3-Acetyl benz[b]thiophene
4-(2-(N-PHENYL-N-ETHYLAMINO)ETHOXY)-3,5-DICHLOROBENZENAMINE
Methyl-1-naphthylketon
