North American Product Classification System (NAPCS) Canada 2017 Version 2.0
- 271 - Basic chemicals
- 27111 - Industrial gases
- 271111 - Industrial gases
- 2711111 - Oxygen
- 2711112 - Nitrogen
- 2711113 - Carbon dioxide
- 2711114 - Acetylene
- 2711115 - Hydrogen
- 2711116 - Argon
- 2711117 - Other industrial gases, n.e.c.
- Date modified: