Related by context. Frequent words. (Click for all words.) 77 Freon 58 refrigerant 57 refrigerants 52 solvents 52 vapor 51 gases 50 mercury vapor 49 refrigerators freezers 49 chlorofluorocarbons 49 CFCs 49 muriatic acid 48 coolant 48 ammonia 48 ozone depleting 47 acetylene 47 catalytic converter 47 gaseous 47 chlorine 47 oxidizer 47 mercury thermometers 47 hazardous materials 46 coolants 46 Antifreeze 46 gasses 46 hydrofluoric acid 45 hazardous chemicals 45 liquid ammonia 45 acetone 45 flammable liquids 45 Chlorine 45 vinyl chloride 45 condenser 45 hazardous waste 45 isopropyl alcohol 45 vapors 45 dioxide 45 flammable 44 degreaser 44 harmful toxins 44 water heater 44 HCFC 44 VOCs 44 trichlorethylene 44 Ammonia 44 hazardous material 44 hydrogen sulfide 44 water softener 44 dehumidifier 43 antifreeze 43 Anhydrous ammonia 43 aerosol cans 43 suspected carcinogen 43 furnace 43 exhaust gases 43 noxious gases 43 methane 43 hazardous substances 43 carbon monoxide 43 phosgene 43 sodium hypochlorite 43 sterilizer 43 ozone depleting substances 43 pollutant 43 propane tank 43 volatile organic compounds 43 Hazardous waste 43 hydrochloric acid 43 air conditioner 43 Carbon dioxide 43 fluorine 43 diesel particulate filter 43 anhydrous ammonia 43 softener 42 H2S 42 harmful chemicals 42 mercury 42 hazardous wastes 42 hexane 42 toxic substances 42 HEPA filter 42 formic acid 42 hydrazine 42 carbon monoxide CO 42 PVC piping 42 compressed air 42 propane 42 Batteries 42 condensers 42 nitrous oxide 42 air compressors 42 heat exchangers 42 grease 42 activated charcoal 42 liquid helium 42 windshield washer fluid 42 Critical violations 42 refrigeration 42 toxic gases 42 sodium hydroxide 42 chemicals 42 glycol