| Class | Class Name |
|---|---|
| 1 | oil-based compounds for plasticizers |
| 1 | oil-bleaching chemicals |
| 1 | oil-purifying chemicals |
| 1 | oils for currying leather |
| 1 | oils for preparing leather in the course of manufacture |
| 1 | oils for tanning leather |
| 1 | oils for tanning leather |
| 1 | oils for the preservation of food |
| 1 | oils for use in the preservation of foods |
| 1 | oil-separating chemicals |
| 1 | oleic acid |
| 1 | olivine [silicate mineral] |
| 1 | opacifiers for enamel |
| 1 | opacifiers for glass |
| 1 | organic chemicals |
| 1 | organic digestate [fertiliser] |
| 1 | organic digestate [fertilizer] |
| 1 | organic fertilizers |
| 1 | organic non-corrosive fluxes |
| 1 | organic silicon resins |
| 1 | oxalates |
| 1 | oxalic acid |
| 1 | oxidation inhibitors |
| 1 | oxygen for industrial purposes |
| 1 | oxygen in gasified and liquefied form |
| 1 | oxygen mixtures |
| 1 | palladium chloride |
| 1 | paper pulp |
| 1 | paste fillers for automobile body repair |
| 1 | paste fillers for car body repair |
| 1 | peat [fertiliser] |
| 1 | peat [fertilizer] |
| 1 | peat pots for horticulture |
| 1 | pectin for industrial purposes |
| 1 | pectin for the food industry |
| 1 | pectin [photography] |
| 1 | perborate of soda |
| 1 | percarbonates |
| 1 | perchlorates |
| 1 | persulfates |
| 1 | persulfuric acid |
| 1 | petrochemical fluids used as components in synthetic lubricants for use in motor vehicles |
| 1 | petroleum dispersants |
| 1 | phenol for industrial purposes |
| 1 | phosphates [fertilisers] |
| 1 | phosphates [fertilizers] |
| 1 | phosphatides |
| 1 | phosphoric acid |
| 1 | phosphorus |
| 1 | photographic chemical preparations |
