non-carcinogenic       
adjective (also noncarcinogenic) uk/ˌnɒnˌkɑː.sən.əˈdʒen.ɪk/ us/ˌnɑːnˌkɑːr.sən.oʊˈdʒen.ɪk/
 非致癌的
not likely to cause cancer
  Smoking was once thought to be non-carcinogenic. 吸烟曾经被认为是不致癌的。 
 This weed-killer is noncarcinogenic to humans.
 Opposite: carcinogenic
 - More examples
 - The oil that is used to produce the ink is non-carcinogenic.
 - They are trying to prevent cancer by eating a plant-based diet and living in a clean, non-carcinogenic environment.
 - Ideally, the material used should be cheap, durable, and noncarcinogenic.
 - This vine is a source of a non-carcinogenic form of nicotine.