LlbKHKY Ul- CONURESS MLCM United States Office of Research and E P A/600/R-00/099 Environmental Protection Development March 2001 Agency Washington DC 20460 2006/02671 :PA Sources, Emission and FT MEADE GenCol1 Exposure for .^arch and Development Trichloroethylene (TCE) and Related Chemicals EPA/600/R-00/099 March 2001 OCT 29.200 1 \ / SOURCES, EMISSION AND EXPOSURE FOR TRICHLOROETHYLENE (TCE) AND RELATED CHEMICALS National Center for Environmental Assessment-Washington Office Office of Research and Development U.S. Environmental Protection Agency Washington, DC 20460 /T"'y Recycled/Recyclable Printed wwiitthh vveeggeettaabbllee-- based ink on paper that contains a minimum of 50% post-consumer fiber content processed chlorine free. LIBRARY OF CONGRESS MLCH 2006/02671 DISCLAIMER This report has been reviewed in accordance with U.S. Environmental Protection Agency policy and approved for publication. Mention of trade names or commercial products does not constitute endorsement or recommendation for use. LC Control Number 2001 344253 TABLE OF CONTENTS LIST OF TABLES. x LIST OF FIGURES.xi PREFACE . xii AUTHORS, CONTRIBUTORS, AND REVIEWERS.xiii SECTION A. SUMMARY AND INTRODUCTION.1 SUMMARY.1 INTRODUCTION.10 SECTION B. PARENT COMPOUNDS .13 1.0 TRICHLOROETHYLENE .13 1.1 CHEMICAL AND PHYSICAL PROPERTIES .13 1.1.1 Nomenclature.13 1.1.2 Formula and Molecular Weight.13 1.1.3 Chemical and Physical Properties.13 1.1.4 Technical Products and Impurities.14 1.2 PRODUCTION AND USE.14 1.2.1 Production .14 1.2.2 Uses.14 1.2.3 Disposal.15 1.3 POTENTIAL FOR HUMAN EXPOSURE.15 1.3.1 Natural Occurrence .15 1.3.2 Occupational Exposure .15 1.3.3 Environmental .15 1.4 HUMAN EXPOSURE AND POPULATION ESTIMATES .23 1.4.1 General U.S. Population . 23 1.4.2 Occupational Exposure .26 1.4.3 Consumer Exposure.27 1.5 CHAPTER SUMMARY.27 2.0 TETRACHLOROETHYLENE (PERCHLOROETHYLENE).30 2.1 CHEMICAL AND PHYSICAL PROPERTIES .30 2.1.1 Nomenclature.30 2.1.2 Formula and Molecular Weight.30 2.1.3 Chemical and Physical Properties. 30 2.1.4 Technical Products and Impurities.31 2.2 PRODUCTION AND USE.31 m TABLE OF CONTENTS (continued) 2.2.1 Production .31 2.2.2 Uses.32 2.2.3 Disposal.32 2.3 POTENTIAL FOR HUMAN EXPOSURE.32 2.3.1 Natural Occurrence .32 2.3.2 Occupational .32 2.3.3 Environmental.33 2.4 HUMAN EXPOSURE AND POPULATION ESTIMATES .40 2.4.1 General U.S. Population .40 2.4.2 Occupational Exposure .41 2.4.3 Consumer Exposure.41 2.5 CHAPTER SUMMARY.41 3.0 1,1,1 -TRICHLOROETHANE (METHYL CHLOROFORM).44 3.1 CHEMICAL AND PHYSICAL PROPERTIES .44 3.1.1 Nomenclature.44 3.1.2 Formula and Molecular Weight.44 3.1.3 Chemical and Physical Properties.44 3.1.4 Technical Products and Impurities.45 3.2 PRODUCTION AND USE.45 3.2.1 Production .45 3.2.2 Uses.46 3.2.3 Disposal.46 3.3 POTENTIAL FOR HUMAN EXPOSURE.46 3.3.1 Natural Occurrence .46 3.3.2 Occupational .46 3.3.3 Environmental .47 3.4 HUMAN EXPOSURE AND POPULATION ESTIMATES .52 3.4.1 General U.S. Population .52 3.4.2 Occupational Exposure .52 3.4.3 Consumer Exposure .54 3.5 CHAPTER SUMMARY.54 4.0 1,2-DICHLOROETHYLENE.56 4.1 CHEMICAL AND PHYSICAL PROPERTIES .56 4.1.1 Nomenclature.56 4.1.2 Formula and Molecular Weight.56 4.1.3 Chemical and Physical Properties.56 4.1.4 Technical Products and Impurities.57 4.2 PRODUCTION AND USE.57 4.2.1 Production .57 4.2.2 Uses.57 4.2.3 Disposal.58 4.3 POTENTIAL FOR HUMAN EXPOSURE.58 IV TABLE OF CONTENTS (continued) 4.3.1 Natural Occurrence .58 4.3.2 Occupational .58 4.3.3 Environmental .58 4.4 HUMAN EXPOSURE AND POPULATION ESTIMATES .62 4.4.1 General U.S. Population . 62 4.4.2 Occupational Exposure .62 4.4.3 Consumer Exposure.64 4.5 CHAPTER SUMMARY.64 5.0 CIS-1,2-DICHLOROETHYLENE .65 5.1 CHEMICAL AND PHYSICAL PROPERTIES .65 5.1.1 Nomenclature.65 5.1.2 Formula and Molecular Weight.65 5.1.3 Chemical and Physical Properties.65 5.1.4 Technical Products and Impurities.66 5.2 PRODUCTION AND USE.66 5.2.1 Production .66 5.2.2 Uses.66 5.2.3 Disposal.67 5.3 POTENTIAL FOR HUMAN EXPOSURE.67 5.3.1 Natural Occurrence .67 5.3.2 Occupational . 67 5.3.3 Environmental .67 5.4 HUMAN EXPOSURE AND POPULATION ESTIMATES .70 5.4.1 General U.S. Population .70 5.4.2 Occupational Exposure .70 5.4.3 Consumer Exposure.70 6.0 TRANS-1,2-DICHLOROETHYLENE.71 6.1 CHEMICAL AND PHYSICAL PROPERTIES .71 6.1.1 Nomenclature.71 6.1.2 Formula and Molecular Weight.71 6.1.3 Chemical and Physical Properties.71 6.1.4 Technical Products and Impurities.72 6.2 PRODUCTION AND USE.:.72 6.2.1 Production .72 6.2.2 Uses.72 6.2.3 Disposal.73 6.3 POTENTIAL FOR HUMAN EXPOSURE.73 6.3.1 Natural Occurrence .73 6.3.2 Occupational .73 6.3.3 Environmental . 73 6.4 HUMAN EXPOSURE AND POPULATION ESTIMATES .76 6.4.1 General U.S. Population .76 v TABLE OF CONTENTS (continued) 6.4.2 Occupational Exposure .76 6.4.3 Consumer Exposure.76 7.0 1,1,1,2-TETRACHLOROETHANE .77 7.1 CHEMICAL AND PHYSICAL PROPERTIES .77 7.1.1 Nomenclature.77 7.1.2 Formula and Molecular Weight.77 7.1.3 Chemical and Physical Properties.77 7.1.4 Technical Products and Impurities.78 7.2 PRODUCTION AND USE.78 7.2.1 Production . 78 7.2.2 Uses.78 7.2.3 Disposal.79 7.3 POTENTIAL FOR HUMAN EXPOSURE.79 7.3.1 Natural Occurrence .79 7.3.2 Occupational .79 7.3.3 Environmental .79 7.4 HUMAN EXPOSURE AND POPULATION ESTIMATES .81 7.4.1 General U.S. Population .81 7.4.2 Occupational Exposure .82 7.4.3 Consumer Exposure.82 7.5 CHAPTER SUMMARY.82 8.0 1,1 -DICHLOROETHANE.83 8.1 CHEMICAL AND PHYSICAL PROPERTIES .83 8.1.1 Nomenclature.83 8.1.2 Formula and Molecular Weight.83 8.1.3 Chemical and Physical Properties.83 8.1.4 Technical Products and Impurities.84 8.2 PRODUCTION AND USE.84 8.2.1 Production .84 8.2.2 Uses.84 8.2.3 Disposal.84 8.3 POTENTIAL FOR HUMAN EXPOSURE.85 8.3.1 Natural Occurrence .85 8.3.2 Occupational .85 8.3.3 Environmental .85 8.4 HUMAN EXPOSURE AND POPULATION ESTIMATES .88 8.4.1 General U.S. Population .88 8.4.2 Occupational Exposure .88 8.4.3 Consumer Exposure.88 8.5 CHAPTER SUMMARY.90 SECTION C. METABOLITES OF TRICHLOROETHYLENE AND PARENT COMPOUNDS .91 vi TABLE OF CONTENTS (continued) 9.0 CHLORAL.91 9.1 CHEMICAL AND PHYSICAL PROPERTIES .91 9.1.1 N omenclature.91 9.1.2 Formula and Molecular Weight.91 9.1.3 Chemical and Physical Properties.91 9.1.4 Technical Products and Impurities.92 9.2 PRODUCTION AND USE.92 9.2.1 Production .92 9.2.2 Uses.93 9.2.3 Disposal.93 9.3 POTENTIAL FOR HUMAN EXPOSURE.93 9.3.1 Natural Occurrence .93 9.3.2 Occupational .93 9.3.3 Environmental .94 9.4 HUMAN EXPOSURE AND POPULATION ESTIMATES .96 9.4.1 General U.S. Population .96 9.4.2 Occupational Exposure .96 9.4.3 Consumer Exposure.96 9.5 CHAPTER SUMMARY.96 10.0 CHLORAL HYDRATE.98 10.1 CHEMICAL AND PHYSICAL PROPERTIES .98 10.1.1 Nomenclature.98 10.1.2 Formula and Molecular Weight.98 10.1.3 Chemical and Physical Properties.98 10.1.4 Technical Products and Impurities.99 10.2 PRODUCTION AND USE.99 10.2.1 Production .99 10.2.2 Uses.100 10.2.3 Disposal.100 10.3 POTENTIAL FOR HUMAN EXPOSURE.100 10.3.1 Natural Occurrence .100 10.3.2 Occupational .100 10.3.3 Environmental .100 10.4 HUMAN EXPOSURE AND POPULATION ESTIMATES .102 10.5 CHAPTER SUMMARY.102 11.0 MONOCHLOROACETIC ACID.103 11.1 CHEMICAL AND PHYSICAL PROPERTIES .103 11.1.1 Nomenclature.103 11.1.2 Formula and Molecular Weight.103 11.1.3 Chemical and Physical Properties. 103 11.1.4 Technical Products and Impurities.104 11.2 PRODUCTION AND USE.104 vii TABLE OF CONTENTS (continued) 11.2.1 Production .104 11.2.2 Uses .104 11.2.3 Disposal.104 11.3 POTENTIAL FOR HUMAN EXPOSURE.105 11.3.1 Natural Occurrence .105 11.3.2 Occupational .105 11.3.3 Environmental .105 11.4 HUMAN EXPOSURE AND POPULATION ESTIMATES .107 11.5 CHAPTER SUMMARY.107 12.0 DICHLOROACETIC ACID.109 12.1 CHEMICAL AND PHYSICAL PROPERTIES .109 12.1.1 Nomenclature.109 12.1.2 Formula and Molecular Weight.109 12.1.3 Chemical and Physical Properties.109 12.1.4 Technical Products and Impurities.110 12.2 PRODUCTION AND USE . ..110 12.2.1 Production .110 12.2.2 Uses.110 12.2.3 Disposal.110 12.3 POTENTIAL FOR HUMAN EXPOSURE.110 12.3.1 Natural Occurrence .110 12.3.2 Occupational .110 12.3.3 Environmental.Ill 12.4 HUMAN EXPOSURE AND POPULATION ESTIMATES .112 12.4.1 General U.S. Population .112 12.4.2 Occupational Exposure .112 12.4.3 Consumer Exposure.112 12.5 CHAPTER SUMMARY.112 13.0 TRICHLOROACETIC ACID.113 13.1 CHEMICAL AND PHYSICAL PROPERTIES .113 13.1.1 Nomenclature.113 13.1.2 Formula and Molecular Weight.113 13.1.3 Chemical and Physical Properties.113 13.1.4 Technical Products and Impurities.114 13.2 PRODUCTION AND USE.114 13.2.1 Production .114 13.2.2 Uses .114 13.2.3 Disposal.115 13.3 POTENTIAL FOR HUMAN EXPOSURE.115 13.3.1 Natural Occurrence .115 13.3.2 Occupational .115 13.3.3 Environmental .115 Vlll