Explanatory notes
… see the Explanatory Note to heading 28.42. This sub‑Chapter excludes , inter alia : (a) Salts of Chapter 25 (e.g., … Chapter 32 . This sub‑Chapter covers unmixed metal salts (except luminophores), suitable for direct use as pigments; … in embalming, as an insecticide, etc. This heading excludes non‑metal fluorides ( heading 28.12 ). (B) …