Artificial corundum, whether or not chemically defined, with >= 50 % of the total weight having a particle size > 10 mm (excl. with an aluminium oxide content < 98,5% by weight)

Artificial corundum, whether or not chemically defined, with < 50 % of the total weight having a particle size > 10 mm (excl. with an aluminium oxide content >= 98,5% by weight "high purity")

Sintered corundum with a micro crystalline structure, consisting of aluminium oxide (CAS RN 1344-28-1), magnesium aluminate (CAS RN 12068-51-8) and the rare earth aluminates of yttrium, lanthanum, and neodymium, with a content by weight (calculated as oxides) of: - 94 % or more, but less than 98,5 % of aluminium oxide, - 2 % (± 1,5 %) of magnesium oxide, - 1 % (± 0,6 %) of yttrium oxide, and - either 2 % (± 1,2 %) of lanthanum oxide or - 2 % (± 1,2 %) of lanthanum oxide and neodymium oxide, with less than 50 % of the total weight having a particle size of more than 10 mm

Artificial corundum, whether or not chemically defined, with >= 50 % of the total weight having a particle size > 10 mm (excl. with an aluminium oxide content >= 98,5% by weight "high purity")

Aluminium oxide (excl. artificial corundum)

Activated alumina with a specific surface area of at least 350 m²/g

Aluminium hydroxide

Aluminium hydroxide (CAS RN 21645-51-2) - in the form of powder - with a purity by weight of 99,5 % or more - with a decomposition point of 263o C or more - with a particle size of 4 µm (± 1 µm) - with a Total-Na2O-content by weight of not more than 0,06 %

Aluminium hydroxide oxide (CAS RN 1318-23-6) in the form of boehmite or pseudoboehmite

Chromium trioxide

Chromium dioxide

Chromium oxides and hydroxides (excl. chromium trioxide and chromium dioxide)

Manganese dioxide

Manganese oxide containing by weight >= 77% of manganese

Manganese oxides (excl. manganese dioxide and manganese oxide containing by weight >= 77% of manganese)