CN2804

28 Inorganic Chemicals, Organic or Inorganic Compounds of Precious Metals, of Rare-earth Metals, of Radioactive Elements or of Isotopes

2804 (01/1988-..) Hydrogen, Rare Gases and Other Non-metals

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28041000 (01/1988-..) Hydrogen

28042100 (01/1988-..) Argon

28042900 (01/1988-12/1996) Rare Gases (Excl. Argon)

28042910 (01/1997-..) Helium

28042990 (01/1997-..) Neon, Krypton and Xenon

28043000 (01/1988-..) Nitrogen

28044000 (01/1988-..) Oxygen

28045010 (01/1988-..) Boron

28045090 (01/1988-..) Tellurium

28046100 (01/1988-..) Silicon Containing >= 99,99% by Weight of Silicon

28046900 (01/1988-..) Silicon Containing < 99,99% by Weight of Silicon

28047000 (01/1988-..) Phosphorus

28048000 (01/1988-..) Arsenic

28049000 (01/1988-..) Selenium