nontoxic

Nontoxic things aren't poisonous. It's generally safe to eat or breathe nontoxic substances, and they don't harm the environment.

It's a good thing if the ingredients in your dish soap are nontoxic — it means the suds washing down the drain won't be harmful to the environment, and the residue left on your dishes won't hurt you, either. You can use the adjective nontoxic to distinguish something from its more dangerous, toxic variation. Toxic waste poisons the groundwater or makes nearby animals sick, but nontoxic waste tends to break down without any negative consequences.

Definitions of nontoxic
  1. adjective
    not producing or resulting from poison
    synonyms: atoxic
    harmless
    not causing or capable of causing harm
    antitoxic
    counteracting a toxin or poison
    non-poisonous, nonpoisonous
    not producing poison
    nonvenomous
    not producing venom
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    Antonyms:
    toxic
    of or relating to or caused by a toxin or poison
    harmful
    causing or capable of causing harm
    unhealthful
    detrimental to good health
    noxious
    injurious to physical or mental health
    cyanogenetic, cyanogenic
    capable of producing cyanide
    deadly, venomous, virulent
    extremely poisonous or injurious; producing venom
    hepatotoxic
    toxic to the liver
    nephrotoxic
    toxic to the kidney
    ototoxic
    toxic to the organs of hearing or balance or to the auditory nerve
    poisonous, toxicant
    having the qualities or effects of a poison
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  2. adjective
    safe to eat
    synonyms: non-poisonous, nonpoisonous
    comestible, eatable, edible
    suitable for use as food
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