2818 Artificial Corundum, Whether or not Chemically Defined, Aluminium Oxide, Aluminium Hydroxide

2818 (01/1988-..) Artificial Corundum, Whether or not Chemically Defined, Aluminium Oxide, Aluminium Hydroxide 28181000 (01/1988-12/1996) Artificial Corundum 28181010 (01/1997-12/2007) Artificial Corundum, Whether or not Chemically Defined, White, Pink or Ruby, With an Aluminium Oxide Content > 97,5% by Weight `high Purity` 28181011 (01/2008-..) Artificial Corundum, Whether or not Chemically Defined, With < 50% of the Total Weight Having a Particle Size > 10mm (Excl. With Aluminium Oxide Content < 98,5% by Weight) 28181019 (01/2008-..) Artificial Corundum, Whether or not Chemically Defined, With >= 50% of the Total Weight Having a Particle Size > 10mm (Excl. With an Aluminium Oxide Content < 98,5% by Weight) 28181090 (01/1997-12/2007) Artificial Corundum, Whether or not Chemically Defined (Excl. White, Pink or Ruby, With an Aluminium Oxide Content > 97,5% by Weight `high Purity`) 28181091 (01/2008-..) Artificial Corundum, Whether or not Chemically Defined, With < 50% of the Total Weight Having a Particle Size > 10mm (Excl. With an Aluminium Oxide Content >= 98,5% by Weight `high Purity`) 28181099 (01/2008-..) Artificial Corundum, Whether or not Chemically Defined, With >= 50% of the Total Weight Having a Particle Size > 10mm (Excl. With an Aluminium Oxide Content >= 98,5% by Weight `high Purity`) 28182000 (01/1988-..) Aluminium Oxide (Excl. Artificial Corundum) 28183000 (01/1988-..) Aluminium Hydroxide