Vinylidene Chloride

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vinylidene chloride

[vī′nil·ə‚dēn ′klȯr‚īd]
(organic chemistry)
CH2:CCl2 A colorless, flammable, explosive liquid, insoluble in water; boils at 37°C; used to make polymers copolymerized with vinyl chloride or acrylonitrile (Saran).
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Vinylidene Chloride

 

(1,1-dichloroethylene, CH2= CC12), a colorless liquid that has an odor resembling that of chloroform; Tb = 31.7° C. Density at 20° C, 1.212 g/cm3. The explosive limit of mixtures with air is 7-16 percent by volume. Vinylidene chloride polymerizes spontaneously in air; therefore it is stored in the presence of inhibitors such as hydroquinone.

Vinylidene chloride is made by dehydrochlorination of 1,1,2-trichloroethane (-100° C):

2CH2Cl–CHCl2+Ca(OH)2→2CH2=CCl2+CaCl2+2H2

Vinylidene chloride is used to make polyvinylidene chloride and copolymers with vinyl chloride, acrylonitrile, and other technologically important copolymers.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Table 1: Comparison of PDE and MCL in three toxicological studies 2003 2003 2006 ICH Q3C ICH Q3C EAP DW Solvent CAS # Class PDE (mg/day) 2L/day MCL (mg/day) Chlorobenzene 108-90-7 2 3.6 0.2 Chloroform 67-66-3 2 0.6 0.16 Dichloromethane 75-09-2 2 6.0 0.01 Toluene 108-88-3 2 8.9 2 1,1,2-trichloroethane 79-00-5 2 0.8 0.01 Xylenes 1330-20-7 2 21.7 20 Benzene 71-43-2 1 0.02 0.01 Carbon tetrachloride 56-23-5 1 0.04 0.01 1,2-dichloroethane 107-06-2 1 0.05 0.01 1,1-dichloroethene 75-35-4 1 0.08 0.014 1,1-dichloroethene 71-55-6 1 15 0.4 A different toxicological risk analysis is required for potentially genotoxic (mutagenic) compounds, because there is no lower threshold concentration for genotoxic compounds for which the risk is considered zero.
They reported that 7 different VOCs, 1,1-Dichloroethene, methylene chloride, chloroform, benzene, trichloroethene, tetrachloroethene and styrene could be found in printing facilities.

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