Caprolactam used to be the the only chemical IARC had ever classified in their group 4 "probably not carcinogenic to humans" [1] but in 2019 they moved it to gr

Caprolactam used to be the the only chemical IARC had ever classified in their group 4 "probably not carcinogenic to humans" [1] but in 2019 they moved it to group 3 [2]. [1] https://publications.iarc.fr/_publications/media/download/2296/6414c0dc65c24db60ba2f2da740e991b9fd320d7.pdf https://publications.iarc.fr/_publications/media/download/22... [2] https://monographs.iarc.fr/list-of-classifications/ https://monographs.iarc.fr/list-of-classifications/