The International Chemical Secretariat (ChemSec) announced on November 14, 2019, that it added more chemicals, including carbon nanotubes, to its Substitute It Now! (SIN) List.  ChemSec describes carbon nanotubes as “one of the more well-studied nanomaterials” and notes that “they are used to make durable, lightweight materials, for electrical conductivity, as a super black pigment