1,2-Dichloroethane
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Names | |||
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Preferred IUPAC name
1,2-Dichloroethane | |||
Other names
Ethylene dichloride
Ethylene chloride 1,2-DCA 1,2-DCE DCE[1] Ethane dichloride Dutch liquid, Dutch oil Freon 150 | |||
Identifiers | |||
3D model (
JSmol ) |
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3DMet | |||
605264 | |||
ChEBI | |||
ChEMBL | |||
ChemSpider | |||
DrugBank | |||
ECHA InfoCard
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100.003.145 | ||
EC Number |
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49272 | |||
KEGG | |||
PubChem CID
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RTECS number
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UNII | |||
CompTox Dashboard (EPA)
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Properties | |||
C2H4Cl2 | |||
Molar mass | 98.95 g·mol−1 | ||
Appearance | Colorless liquid | ||
Odor | characteristic, pleasant chloroform-like odor[2] | ||
Density | 1.253 g/cm3, liquid | ||
Melting point | −35 °C (−31 °F; 238 K) | ||
Boiling point | 84 °C (183 °F; 357 K) | ||
0.87 g/100 mL (20 °C) | |||
Viscosity | 0.84 mPa·s at 20 °C
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Structure | |||
1.80 D | |||
Hazards | |||
Occupational safety and health (OHS/OSH): | |||
Main hazards
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Toxic, flammable, carcinogenic | ||
GHS labelling: | |||
Danger | |||
H225, H302, H315, H319, H335, H350 | |||
P201, P202, P210, P233, P240, P241, P242, P243, P261, P264, P270, P271, P280, P281, P301+P312, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P308+P313, P312, P321, P330, P332+P313, P337+P313, P362, P370+P378, P403+P233, P403+P235, P405, P501 | |||
NFPA 704 (fire diamond) | |||
Flash point | 13 °C (55 °F; 286 K) | ||
Explosive limits
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6.2–16%[2] | ||
Lethal dose or concentration (LD, LC): | |||
LC50 (median concentration)
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3000 ppm (guinea pig, 7 h) 1000 ppm (rat, 7 h)[3] | ||
LCLo (lowest published)
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1217 ppm (mouse, 2 h) 1000 ppm (rat, 4 h) 3000 ppm (rabbit, 7 h)[3] | ||
NIOSH (US health exposure limits): | |||
PEL (Permissible)
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TWA 50 ppm C 100 ppm 200 ppm [5-minute maximum peak in any 3 hours][2] | ||
REL (Recommended)
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Ca TWA 1 ppm (4 mg/m3) ST 2 ppm (8 mg/m3)[2] | ||
IDLH (Immediate danger) |
Ca [50 ppm][2] | ||
Related compounds | |||
Related haloalkanes
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Methylene chloride
1,1,1-Trichloroethane | ||
Related compounds
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Ethylene Chlorine Vinyl chloride | ||
Supplementary data page | |||
1,2-Dichloroethane (data page) | |||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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The
History
In 1794, physician Jan Rudolph Deiman, merchant Adriaan Paets van Troostwijk, chemist Anthoni Lauwerenburg, and botanist Nicolaas Bondt, under the name of Society of Dutch Chemists (Dutch: Gezelschap der Hollandsche Scheikundigen), were the first to produce 1,2-dichloroethane from olefiant gas (oil-making gas, ethylene) and chlorine gas.[6] Although the Gezelschap in practice did not do much in-depth scientific research, they and their publications were highly regarded. Part of that acknowledgement is that 1,2-dichloroethane was called "Dutch oil" in old chemistry. This is also the origin of the archaic term "olefiant gas" (oil-making gas) for ethylene, for in this reaction it is ethylene that makes the Dutch oil. And "olefiant gas" is the etymological origin of the modern term "olefins", the family of hydrocarbons of which ethylene is the first member.
Production
Nearly 20 million tons of 1,2-dichloroethane are produced annually in the United States, Western Europe, and Japan.[7] Production is primarily achieved through the iron(III) chloride-catalysed reaction of ethylene and chlorine:
- H2C=CH2 (g) + Cl2 (g) → ClC2H4Cl (l) (ΔH⊖r = −218 kJ/mol)
1,2-dichloroethane is also generated by the copper(II) chloride-catalysed oxychlorination of ethylene:
- H2C=CH2 + 2 HCl + 1/2 O2 → ClC2H4Cl + H2O
Uses
Vinyl chloride monomer (VCM) production
Approximately 95% of the world's production of 1,2-dichloroethane is used in the production of vinyl chloride monomer (VCM, chloroethene) with hydrogen chloride as a byproduct. VCM is the precursor to polyvinyl chloride.
- ClC2H4Cl → H2C=CHCl + HCl
The hydrogen chloride can be re-used in the production of more 1,2-dichloroethane via the oxychlorination route described above.[8]
Other uses
1,2-Dichloroethane has been used as degreaser and paint remover but is now banned from use due to its
, with elimination of ethene and chloride.Via several steps, 1,2-dichloroethane is a precursor to
Safety
1,2-Dichloroethane is highly
- ClC2H4Cl + 5/2 O2 → 2 CO2 + H2O + 2 HCl
It is also
Substitutes are recommended and will vary according to application. Dioxolane and toluene are possible substitutes as solvents. Dichloroethane is unstable in the presence of aluminium and, when moist, with zinc and iron.[citation needed]
References
- ^ Staff writer. "Standard Abbreviations and Acronyms" (PDF). The Journal of Organic Chemistry.
DCE: 1,2-dichloroethane
- ^ a b c d e NIOSH Pocket Guide to Chemical Hazards. "#0271". National Institute for Occupational Safety and Health (NIOSH).
- ^ a b "Ethylene dichloride". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
- ^ "Toxic Substances – 1,2-Dichloroethane". ATSDR. Retrieved 23 September 2015.
- .
- ^ Deimann, van Troostwyk, Bondt and Louwrenburgh (1795) "Ueber die Gasarten, welche man aus Verbindungen von starker Vitriolsäure und Alkohol erhält" (On the types of gases which one obtains from combinations of strong vitriolic acid and alcohol), Chemische Annalen ... , 2 : 195-205, 310-316, 430-440. The production and characterization of 1,2-dichloroethane appear on pages 200-202. The investigators were trying to detect the presence of carbon (Kohl) in ethylene (Luft, literally, "air") by adding chlorine (zündend Salzgas, literally, "burning gas from salt"). Instead of the expected soot, an oil (Oehl) formed.
- S2CID 36536985.
- ^ "Ethylene Dichloride – Chemical Economics Handbook (CEH) – IHS Markit". ihs.com. Retrieved 8 April 2018.
- ISBN 9780471238966.
- .
- ^ "1,2-Dichoroethane MSDS." Mallinckrodt Chemicals. 19 May 2008. Web. <http://hazard.com/msds/mf/baker/baker/files/d2440.htm>.
- S2CID 72921.
- ^ "Toxic Christmas: Plastic Ornaments May Pollute Your Air". rodale.com. Archived from the original on 18 March 2012. Retrieved 8 April 2018.
- S2CID 96563330.
External links
- Gezelschap der Hollandsche Scheikundigen
- ChemicalLand compound database
- Environmental Chemistry compound database
- Merck Chemicals database
- National Pollutant Inventory – 1,2 Dichlorethane Fact Sheet
- Locating and estimating air emissions from sources of ethylene dichloride, EPA report EPA-450/4-84-007d, March 1984