[1]

  1. ^ a b c d "Globally Harmonized System of Classification and Labelling of Chemicals" (pdf). 2021.
  2. ^ a b c d e "Globally Harmonized System of Classification and Labelling of Chemicals" (pdf). 2021. Annex 3: Codification of Statements and Pictograms (pp 268–385).
  3. ^ "Globally Harmonized System of Classification and Labelling of Chemicals" (pdf). 2021.