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| 2411 | Naphthalene sulfonic acid, manufacturing | |
| 2411 | Naphthalene, made by distillation of coal tar | |
| 2411 | Naphthalene, made from refined petroleum or natural gas | |
| 2411 | Naphthalene, made from refined petroleum or natural gas liquids | |
| 2411 | Naphthenic acid soaps, manufacturing | |
| 2411 | Naphthenic acids, made from refined petroleum or natural gas | |
| 2411 | Naphthol, alpha and beta, manufacturing | |
| 2411 | Naphtholsulfonic acids, manufacturing | |
| 2411 | Naval stores, gum or wood, manufacturing | |
| 2411 | Neon, manufacturing | |
| 2411 | Nickel ammonium sulphate, manufacturing | |
| 2411 | Nickel carbonate, manufacturing | |
| 2411 | Nickel compounds, not specified elsewhere by process, manufacturing | |
| 2411 | Nickel sulphate, manufacturing | |
| 2411 | Nitrated hydrocarbon derivatives, manufacturing | |
| 2411 | Nitroaniline, manufacturing | |
| 2411 | Nitrobenzene, manufacturing | |
| 2411 | Nitrogen, manufacturing | |
| 2411 | Nitrophenol, manufacturing | |
| 2411 | Nitrosated hydrocarbon derivatives, manufacturing | |
| 2411 | Nitroso dyes, manufacturing | |
| 2411 | Nitrous ether, manufacturing | |
| 2411 | Nitrous oxide, manufacturing | |
| 2411 | Nonene, made from refined petroleum or natural gas liquids | |
| 2411 | Oak extract, manufacturing | |
| 2411 | Ochre pigments, manufacturing | |
| 2411 | Oils, made by distillation of coal tar | |
| 2411 | Oils, wood, made by distillation of wood | |
| 2411 | Olefins (alkenes), made from refined petroleum or natural gas liquids | |
| 2411 | Oleic acid esters, manufacturing | |
| 2411 | Oleum (i.e., fuming sulphuric acid), manufacturing | |
| 2411 | Organic pigments, dyes, lakes and toners, manufacturing | |
| 2411 | Organo-inorganic compounds, manufacturing | |
| 2411 | Orthodichlorobenzene, manufacturing | |
| 2411 | Oxalates (e.g., ammonium oxalate, ethyl oxalate, sodium oxalate), manufacturing | |
| 2411 | Oxalic acid, manufacturing | |
| 2411 | Oxygen, manufacturing | |
| 2411 | Palmitic acid esters and amines, manufacturing | |
| 2411 | Paraffins (alkanes), made from refined petroleum or natural gas liquids | |
| 2411 | Pararosaniline dyes, manufacturing | |
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