NAICS 325998

Overview

The North American Industry Classification System (NAICS) is the federal statistical standard for classifying business establishments to support the collection, analysis, and publication of U.S. economic data. Developed under the Office of Management and Budget with partners in Canada and Mexico, NAICS replaced SIC in 1997 and provides a production-oriented framework for industry comparability across North America. ¹

In the 2022 NAICS, 325998 All Other Miscellaneous Chemical Product and Preparation Manufacturing covers establishments primarily engaged in making chemical products not classified elsewhere in subsector 325, excluding basic chemicals; resins, synthetic rubber, and fibers; pesticides and fertilizers; pharmaceuticals; paints and adhesives; soaps and toilet preparations; printing inks; explosives; custom compounding of purchased resins; and photographic films, papers, plates, and chemicals. Illustrative products include activated carbon, antifreeze, industrial salts, lighter fluids, matches, pyrotechnics, writing inks, and swimming-pool chemical preparations. ²

See also on G2X:

• G2X — NAICS 325998 overview
• G2X — NAICS 325910
• G2X — NAICS 325920

What this NAICS covers

• Activated carbon and charcoal manufacturing. ²
• Antifreeze and other nonpetroleum de-icing preparations manufacturing. ²
• Industrial salt manufacturing for nonfood uses. ²
• Lighter fluids (e.g., charcoal, cigarette) manufacturing. ²
• Matches and matchbook manufacturing. ²
• Pyrotechnics (e.g., flares, signals, flashlight bombs) manufacturing. ²
• Writing inks and swimming-pool chemical preparations manufacturing. ²

Related NAICS and PSC codes

• NAICS descriptors per the 2022 NAICS Manual. ²
• PSC descriptors per the PSC Manual (April 2025). ³

Key exclusions and cross-references

• Basic chemicals are classified in NAICS 3251; resins, synthetic rubber, and fibers are in 3252. ²
• Paints/coatings and adhesives fall under NAICS 325510 and 325520, respectively. ²
• Soaps/cleaners and toilet preparations are covered by NAICS 325611, 325612, 325613, and 325620. ²
• Printing inks are in NAICS 325910; writing and drawing inks are included in NAICS 325998. ²
• Explosives are in NAICS 325920; pyrotechnics (e.g., flares, fireworks) are included in NAICS 325998. ²
• Custom compounding of purchased resins and photographic chemicals/film are in NAICS 325991 and 325992, respectively. ²

Frequently asked questions

• What products typically fall under NAICS 325998?
  Examples include activated carbon, antifreeze, industrial salts, lighter fluids, matches, pyrotechnics, writing inks, and swimming-pool preparations. The category also includes certain nonpetroleum de-icers and synthetic lubricants when not otherwise classified, capturing chemical specialties not elsewhere specified in subsector 325. ²

• Are chlorine preparations for swimming pools included here?
  Yes. Chlorine-based swimming-pool preparations (e.g., tablets, liquids, and related sanitizers) are explicitly included in NAICS 325998. These are packaged chemical preparations intended for pool maintenance, distinct from basic chemical manufacturing classified elsewhere in subsector 325. ²

• How does NAICS 325998 differ from NAICS 325910 and 325920?
  Printing inks are assigned to 325910, while writing and drawing inks are included in 325998. Explosives are covered by 325920, whereas pyrotechnics (e.g., flares and signals) fall under 325998. ²

• Does NAICS 325998 include synthetic lubricating oils and greases?
  Yes. Synthetic lubricating oils and greases are classified in 325998. By contrast, blending and compounding petroleum-based lubricants belong to NAICS 324191. This distinction hinges on synthetic versus petroleum-based formulations and the nature of the manufacturing activity. ²

Useful resources

• G2X — NAICS 325998 overview
• U.S. Census Bureau — 2022 NAICS Manual (authoritative titles, definitions, cross-references). ²
• U.S. Census Bureau — NAICS main page (definition, history, tools). ¹
• GSA — Product and Service Code (PSC) Manual (descriptions for PSCs 6810, 6850, etc.). ³

References

1. U.S. Census Bureau — North American Industry Classification System (NAICS) main page. https://www.census.gov/naics/
2. U.S. Census Bureau — 2022 NAICS Manual (United States). https://www.census.gov/naics/reference_files_tools/2022_NAICS_Manual.pdf
3. U.S. General Services Administration — Product and Service Code (PSC) Manual, April 2025. https://www.acquisition.gov/sites/default/files/manual/PSC%20Manual%20April%202025.pdf