North American Product Classification System (NAPCS) Canada 2017 Version 2.0
- 263 - Dyes and pigments, and petrochemicals
- 26321 - Petrochemicals
- 263212 - Aromatic hydrocarbon gases
- 2632121 - Styrene monomer
- 2632122 - Benzene
- 2632123 - Toluene
- 2632124 - Xylene
- 2632125 - Other aromatic hydrocarbon gases, n.e.c.
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