organic
inorganic, synthetic
dangerous, harmful, hazardous, poisonous, toxic, volatile
agricultural, environmental, household, industrial

manufacture, produce
dump, release
chemicals released by industry into our lakes and rivers

contain
use
We don't use many chemicals on our farm these days.

be exposed to
Many workers are regularly exposed to dangerous chemicals.

factory, plant, works
pollution from a big chemical plant

business, company
industry, manufacturing
weapon

Chemical is used with these nouns:
analysis, attack, burn, component, composition, compound, contamination, dye, engineer, engineering, explosion, explosive, exposure, facility, factory, fertilizer, formula, imbalance, industry, ingredient, laboratory, manufacturer, manufacturing, modification, pesticide, plant, poison, poisoning, pollutant, pollution, preservative, process, property, reaction, science, signal, signature, smell, solvent, spray, structure, substance, symbol, toilet, warfare, waste, weapon