chemophobia

noun

1. (uncountable)An irrational fear of chemicals

   “By chemophobia I mean an exaggerated fear of toxicity brought about by the widespread use of chemicals in food production and processing.”

   “Chemophobia also means that every six months there is a "new scientific finding" about a synthetic chemical found in regular food in very low quantites that, if you ate a cargo ship or two of it every day for three years, could kill you.”