2022 NAICS national industry in sector 31-33 Manufacturing

325110 Petrochemical Manufacturing

NAICS 325110 is the US industry code for petrochemical manufacturing. It covers establishments primarily engaged in (1) manufacturing acyclic (i.e., aliphatic) hydrocarbons such as ethylene, propylene, and butylene made from refined petroleum or liquid hydrocarbons and/or (2) manufacturing cyclic aromatic hydrocarbons such as benzene, toluene, styrene, xylene, ethyl benzene, and cumene made from refined petroleum or liquid hydrocarbons.

Code
325110 (2022 NAICS)
Title
Petrochemical Manufacturing
Part of
Basic Chemical Manufacturing
SBA small business limit
Up to 1,300 employees
Closest UK SIC
19201, 19209, 20110 (details)

Changes coming. The NAICS 2027 revision applies to data from 1 January 2027, and SBA proposed new size standards on 20 August 2026. The values on this page are the ones in force today; we update this page when the official files change.

Official definition

This industry comprises establishments primarily engaged in (1) manufacturing acyclic (i.e., aliphatic) hydrocarbons such as ethylene, propylene, and butylene made from refined petroleum or liquid hydrocarbons and/or (2) manufacturing cyclic aromatic hydrocarbons such as benzene, toluene, styrene, xylene, ethyl benzene, and cumene made from refined petroleum or liquid hydrocarbons.

Source: US Census Bureau, 2022 NAICS descriptions.

When to use a different code

Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:

Source: US Census Bureau, 2022 NAICS cross-references.

Activities listed under 325110

The Census index assigns these 27 activities to this code. If your business matches one, this is your code.

Source: US Census Bureau, 2022 NAICS index file.

SBA size standard for 325110

To count as a small business for SBA loans and federal contracts under NAICS 325110, your business (including affiliates) must not exceed 1,300 employees. Check your business.

Source: SBA table of size standards, effective March 17, 2023.

Closest UK SIC 2007 codes

There is no official one-to-one link between NAICS and UK SIC. These codes share the same international class (ISIC Rev. 4: 1920, 2011), so treat them as a starting point and check the definition.

Built from Census concordances 2022→2017 NAICS and 2017 NAICS→ISIC Rev. 4.

Similar codes to compare

Data last changed November 14, 2026. How this page is built.