28111950 - Other inorganic acids, excluding hydrogen sulphide, for use as petroleum refining catalysts, or for use in the manufacture of animal or poultry feeds, glues or adhesives, optical fibres or optical fibre bundles or cables, typewriter or similar ribbons, polymers in primary forms or profile shapes or sheets of plastics
28111990 - Other
28112 - Other inorganic oxygen compounds of non-metals
281121 - Carbon dioxide
281122 - Silicon dioxide
28112210 - Hydrated silica
28112220 - Silica gel
28112230 - Fused quartz or other fused silica
28112290 - Other
281123 - Sulphur dioxide
281129 - Other
28112910 - Arsenic pentaoxide
28112920 - Arsenic trioxide
28112930 - Sulphur trioxide
28112940 - Dinitrogen oxide
28112950 - Other inorganic oxygen compound of non-metals, for use as petroleum refining catalysts, or for use in the manufacture of animal or poultry feeds, glues or adhesives, optical fibres or optical fibre bundles or cables, typewriter or similar ribbons, polymers in primary forms or profile shapes or sheets of plastics
28111950 - Other inorganic acids, excluding hydrogen sulphide, for use as petroleum refining catalysts, or for use in the manufacture of animal or poultry feeds, glues or adhesives, optical fibres or optical fibre bundles or cables, typewriter or similar ribbons, polymers in primary forms or profile shapes or sheets of plastics
28111990 - Other
28112 - Other inorganic oxygen compounds of non-metals
281121 - Carbon dioxide
281122 - Silicon dioxide
28112210 - Hydrated silica
28112220 - Silica gel
28112230 - Fused quartz or other fused silica
28112290 - Other
281123 - Sulphur dioxide
281129 - Other
28112910 - Arsenic pentaoxide
28112920 - Arsenic trioxide
28112930 - Sulphur trioxide
28112940 - Dinitrogen oxide
28112950 - Other inorganic oxygen compound of non-metals, for use as petroleum refining catalysts, or for use in the manufacture of animal or poultry feeds, glues or adhesives, optical fibres or optical fibre bundles or cables, typewriter or similar ribbons, polymers in primary forms or profile shapes or sheets of plastics