Related by context. Frequent words. (Click for all words.) 72 toluene 61 benzene 61 Benzene 59 butadiene 56 styrene 56 vinyl chloride 56 hexane 56 solvents 55 phenol 55 nitric acid 54 acetic acid 54 Ammonia 53 hydrofluoric acid 53 ammonia 53 paraxylene 53 esters 53 propylene 52 sulfur 52 volatile organic compounds 52 acetone 51 trichlorethylene 51 VOCs 51 Ethylene 51 ethylene oxide 50 caustic soda 50 Sulfur dioxide 49 plasticizers 49 ethylene glycol 49 carcinogens 49 surfactants 49 Formaldehyde 49 sulfuric acid 49 chemicals 49 amine 48 naphthalene 48 hydrochloric acid 48 hydrogen sulfide 48 chlorine 48 propylene glycol 48 ethylene 48 sodium hydroxide 48 carcinogen 47 human carcinogen 47 chemical 47 polychlorinated biphenyls PCBs 47 sorbitol 47 Styrene 47 glycol 47 chromium 47 Surfactants 47 polycyclic aromatic hydrocarbons 47 methyl tertiary butyl ether 47 PFOS 47 isopropyl alcohol 47 manganese 46 phosgene 46 vapors 46 olefins 46 #,# dioxane 46 acetylene 46 pollutant 46 dioxide 46 sulfur dioxide 46 chloride 46 oxides 46 naphtha 46 perchlorethylene 46 amines 46 coal tar 45 aromatics 45 toxic chemicals 45 chlorides 45 Naphtha 45 phosphoric acid 45 Dioxins 45 urea 45 olefin 45 sodium hypochlorite 45 butane 45 flame retardants 45 PBDE 45 hazardous chemicals 45 polypropylene PP 45 gases 45 furans 45 TCE 44 throat irritation 44 trihalomethanes 44 HCl 44 Methanol 44 ethane 44 ester 44 polyolefins 44 toxic substances 44 phthalates 44 carcinogenic 44 hexavalent chromium 44 PAHs 44 contaminant 44 contaminants 44 particulate matter PM