Chloroprene
Structural formula | ||||||||||||||||
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General | ||||||||||||||||
Surname | Chloroprene | |||||||||||||||
other names |
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Molecular formula | C 4 H 5 Cl | |||||||||||||||
Brief description |
colorless, pungent smelling liquid |
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External identifiers / databases | ||||||||||||||||
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properties | ||||||||||||||||
Molar mass | 88.54 g mol −1 | |||||||||||||||
Physical state |
liquid |
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density |
0.96 g cm −3 |
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Melting point |
−130 ° C |
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boiling point |
60 ° C |
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Vapor pressure |
239 mbar (20 ° C) |
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solubility |
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Refractive index |
1.4583 (20 ° C) |
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safety instructions | ||||||||||||||||
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MAK |
Switzerland: 5 ml m −3 or 18 mg m −3 |
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Toxicological data | ||||||||||||||||
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 |
Chloroprene belongs to the group of halogenated hydrocarbons . Chloroprene ignites easily and is highly volatile. The vapors form a highly explosive mixture with air .
Chloroprene has a narcotic effect.
Extraction and presentation
Until the 1970s, chloroprene was obtained from ethyne and hydrochloric acid via butenine :
In newer processes it is produced by reacting 1,3-butadiene with chlorine .
use
Chloroprene is polymerized almost exclusively into chloroprene rubber ( neoprene ) . Stabilizers such as thiodiphenylamine prevent premature polymerisation.
Individual evidence
- ↑ a b c d Entry on chloroprene. In: Römpp Online . Georg Thieme Verlag, accessed on June 11, 2014.
- ↑ a b c d e f g h i Entry on chloroprene in the GESTIS substance database of the IFA , accessed on February 1, 2016(JavaScript required) .
- ↑ David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Physical Constants of Organic Compounds, pp. 3-96.
- ↑ Entry on 2-chlorobuta-1,3-diene in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on August 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .
- ↑ Swiss Accident Insurance Fund (Suva): Limit values - current MAK and BAT values (search for 126-99-8 or chloroprene ), accessed on November 2, 2015.