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Standard Industrial Classification and North American Industrial Classification System codes
| SIC | NAICS | Sector |
| 2812 | 325181 | Alkalies and Chlorine |
| 2821 | 325211 | Plastics and resins |
| 2873 | 325311 | Nitrogen fertilizers |
| 2879 | 32532 | Pesticides and other agricultural chemicals |
| 2911 | 32411 | Petroleum refineries |
| 2611 | 32211 | Pulp mills only |
| 2819 | 325188 | All other basic inorganic chemical manufacturing |
| 2869 | 32511 | Aromatics have been combined with aliphatics from 2869 to form the new petrochemical manufacturing |
| 325192 | Other covers the cyclic crude and intermediate manufacturing | |
| 32511 | Aliphatics, joined with aromatics in petrochemical manufacturing | |
| 325188 | Carbon bisulfide, moved to "All other basic inorganic chemical manufacturing." | |
| 325199 | Other, moved to "All other basic chemical manufacturing." |