NAICS 3251 is the North American Industry Classification System code for Basic Chemical Manufacturing, a industry group in the Chemical Manufacturing subsector (325) of the Manufacturing sector (31-33). It divides into 5 more specific codes, including Petrochemical Manufacturing (325110), Industrial Gas Manufacturing (325120) and Synthetic Dye and Pigment Manufacturing (325130).
NAICS 3251 is the code for Basic Chemical Manufacturing, a industry group in the North American Industry Classification System (NAICS 2022), under 325 (Chemical Manufacturing). It has 5 more specific codes: 325110, 325120, 325130 and 325180 and others.
The parent of NAICS 3251 is 325, Chemical Manufacturing. Every company under 3251 is also counted under 325.