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1 lip 2024 · EPA’s draft risk evaluation preliminarily shows that chronic exposure to 1,1-dichloroethane contributes to the unreasonable risk to aquatic species, including invertebrates and algae, from the manufacturing, processing, and disposal of 1,1-dichloroethane.
Figure 2-13. 1,1-Dichloroethane Occupational Exposure Conceptual Model for Industrial and Commercial Activities and Uses: Worker and Occupational Non-User Exposures and Hazards.
1,1-Dichloroethylene is formed by a minor pathway during the anaerobic biodegradation of trichloroethylene and also by the hydrolysis of 1,1,1-trichloroethane. Therefore there is a potential for it to form in groundwater that has been contaminated by chlorinated solvents.
EPA has determined that 1,1-dichloroethane is a suitable candidate for the proposed designation as a high-priority chemical substance.
The chemical and physical properties of 1,1-DCE (ATSDR, 1994; IARC, 1999) are presented below. CAS name: 1,1-dichloroethene CAS number: 75-35-4 IUPAC name: 1,1-dichloroethylene Primary synonyms: 1,1-DCE; vinylidene chloride, vinylidene dichloride Chemical formula: C2H2Cl2 Chemical structure: Cl2C=CH2 Molecular weight: 96.94
What is 1,1-DCE and how is it used? 1,1-Dichloroethylene (1,1-DCE) is an organic liquid with a mild, sweet, chloroform-like odor. Virtually all of it is used in making adhesives, synthetic fibers, refrigerants, food packaging and coating resins such as the saran types.
Environmental Fate: • Persistent and mobile in soils; is expected to migrate with ground water • Based on information about similar compounds. 1,1- DCE is expected to evaporate rapiaiy from surface waters and degrade within hours in air • Expectea to remain in grouna water for months or years • Not likely to bioaccumulate in individual ...
