Explanatory notes
… salts are specifically referred to in headings 28.26 to 28.41; for example, fluorosilicates, fluoroborates and other … salts not so specified, see the Explanatory Note to heading 28.42. This sub‑Chapter excludes , inter alia : (a) Salts of … of Chapter 26 . (c) Compounds of precious metals ( heading 28.43 ), of radioactive elements ( heading 28.44 ), of rare- …