2804210000 10
- Rare gases
2804210000 80
- - Argon
2804290000 80
- - Other
2804291000 80
- - - Helium
2804299000 80
- - - Other
2804500000 80
- Boron; tellurium
2804501000 80
- - Boron
2804509000 80
- - Tellurium
2804610000 10
- Silicon
2804610000 80
- - Containing by weight not less than 99,99 % of silicon
2804700000 80
- Phosphorus
2804701000 80
- - Red phosphorus
2804709000 80