Chemical Manufacturing in New Hampshire
NAICS 325 · NH
New Hampshire is home to Chemical Manufacturing, an industry with 86 establishments counted by the Bureau of Labor Statistics in 2024. Lonza Portsmouth in Portsmouth had 1,574 employees in 2025, more than any other plant listed. This register lists 104 facilities in 42 cities across New Hampshire as of 2026.
SUMMARIZED FROM THE FEDERAL FIGURES ON THIS PAGE
Map, cities and product lines
Plants in New Hampshire32 FACILITIES
| Facility | City | Employees | Status |
|---|---|---|---|
| Hologic INC | Londonderry | 20–99 | ACTIVE |
| Airgas Usa, LLC | Salem | — | ACTIVE |
| American Laboratory Products Company, LTD | Salem | — | ACTIVE |
| Appli-tec INC | Salem | 20–99 | ACTIVE |
| Henkel US Operations Corporation | Seabrook | 20–99 | ACTIVE |
| Textiles Coated, Incorporated | Londonderry | 100–499 | ACTIVE |
| Arctic Dry Ice, LLC | Londonderry | — | ACTIVE |
| Lonza Biologics | Portsmouth | — | LIKELY ACTIVE |
| Henkel Corporation | Seabrook | — | UNVERIFIED |
| Thunderline-z | Hampstead | — | UNVERIFIED |
| Beach Brand Foods, LLC | Salem | — | LIKELY ACTIVE |
| Id Vet INC | Hampton | — | LIKELY ACTIVE |
| Wayne Manufacturing Industries, LLC | Brentwood | — | LIKELY ACTIVE |
| Boston Analytical INC Dba Ba Sciences | Salem | — | LIKELY ACTIVE |
| Henkel Locktite | Seabrook | — | UNVERIFIED |
| Culture Organics, INC. | Rye | — | LIKELY ACTIVE |
| FoodState dba MegaFood | Londonderry | 100–499 | LIKELY ACTIVE |
| Lonza Portsmouth | Portsmouth | 500+ | LIKELY ACTIVE |
| Adhesive Technologies, INC. | Hampton | — | UNVERIFIED |
| Alpco Diagnostics INC | Salem | — | UNVERIFIED |
| Corium, CORP. | Seabrook | — | UNVERIFIED |
| Gp Vapor INC | Salem | — | UNVERIFIED |
| Hero Bx | North Hampton | — | UNVERIFIED |
| Itaconix CORP | Stratham | — | UNVERIFIED |
| Labor Ready | Brentwood | — | UNVERIFIED |
| Lonza Biologics | Portsmouth | — | UNVERIFIED |
| Lonza Biologics INC. | Portsmouth | — | UNVERIFIED |
| Morton Intl INC | Seabrook | — | UNVERIFIED |
| Pierce & Stevens CORP | Seabrook | — | UNVERIFIED |
| Plastic Technologies of Vermont, INC | Londonderry | — | UNVERIFIED |
| Polyexe Corporation | Brentwood | — | UNVERIFIED |
| Safety-kleen Systems INC - Newington Facility | Newington | — | UNVERIFIED |
All chemical manufacturing nationwide · All manufacturing in New Hampshire