| JMJms Manufacturing CO INC | Fall River | MA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| LILepages INC | Gloucester | MA | Chemical Manufacturing325520 | — | ◇ UNVERIFIED |
| LILilly Industrial Coating | Templeton | MA | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| LPLynn Plastics Company LLC | Lynn | MA | Chemical Manufacturing325991 | — | ◇ UNVERIFIED |
| MGMacdermid Graphic Arts | Adams | MA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| MEMagnesium Elektron | Plymouth | MA | Chemical Manufacturing325992 | — | ◇ UNVERIFIED |
| MEMaibec Eastern INC | Stoughton | MA | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| MAMarathon a Division of Copharma | Hopkinton | MA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| MTMatheson Tri-gas | Gloucester | MA | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| MPMillennium Pharmaceuticals INC | Cambridge | MA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| MTModerna Therapeutics | Cambridge | MA | Chemical Manufacturing325413 | — | ◇ UNVERIFIED |
| MTModerna Therapeutics INC. | Norwood | MA | Chemical Manufacturing325992 | — | ◇ UNVERIFIED |
| MDModern Dispersion | Leominster | MA | Chemical Manufacturing325991 | — | ◇ UNVERIFIED |
| MCMonson Chemical Distribution | Leominster | MA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| MIMorton International | Beverly | MA | Chemical Manufacturing325188 | — | ◇ UNVERIFIED |
| MCMultilayer Coating Technologies | New Bedford | MA | Chemical Manufacturing325992 | — | ◇ UNVERIFIED |
| MFMwra Fore River Staging Area | Quincy | MA | Chemical Manufacturing325311 | — | ◇ UNVERIFIED |
| MIMylec INC | Winchendon | MA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| NPNatural Pharmaceuticals | Fall River | MA | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| NENew England Plastic | Norton | MA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| NENew England Treatment Access | Franklin | MA | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| NMNew Model Cleaners INC. | Boston | MA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| NSNext-gen Supply Group INC | Mansfield | MA | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| NCNorthrop CORP. Electronics Sys. Div. Plant 8 | Norwood | MA | Chemical Manufacturing325413 | — | ◇ UNVERIFIED |
| NCNova Chemicals INC | Indian Orchard | MA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| NCNovacor Chemical INC | Leominster | MA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| NCNubrite Chemical CO R-3 | Taunton | MA | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| N1Nv 11 State Fund LLC | Woburn | MA | Chemical Manufacturing325520 | — | ◇ UNVERIFIED |
| OLOraceutical LLC | Lee | MA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| PIParatronix Incorporated | Attleboro | MA | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| PHParker Hannifin CORP Chomerics Division | Woburn | MA | Chemical Manufacturing325520 | — | ◇ UNVERIFIED |
| PCParks Corporation | Somerset | MA | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| PLPerkinelmer Life Sciences INC | Boston | MA | Chemical Manufacturing325188 | — | ◇ UNVERIFIED |
| PIPerma INC | Bedford | MA | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| PDPermuthane Div of Stahl USA | Peabody | MA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| PRPfizer Research | Andover | MA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| PRPfizer Research | Cambridge | MA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| PCPharmasol Contract Development & Manufacturing | South Easton | MA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| PIPhotex Imaging Systems | Williamstown | MA | Chemical Manufacturing325992 | — | ◇ UNVERIFIED |
| PPPittsfield Plastics Engineering LLC | Pittsfield | MA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| PCPlz CORP | Fall River | MA | Chemical Manufacturing325620 | — | ◇ UNVERIFIED |
| PCPolaroid CORP | Cambridge | MA | Chemical Manufacturing325992 | — | ◇ UNVERIFIED |
| PCPolaroid Corporation | Waltham | MA | Chemical Manufacturing325992 | — | ◇ UNVERIFIED |
| PPolaroid (former) | Waltham | MA | Chemical Manufacturing325992 | — | ◇ UNVERIFIED |
 Polycarbon Industries INC | Ayer | MA | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| Polycarbon Industries, INC. | Leominster | MA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| PLPolyclad Laminates | Millbury | MA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| PCPolymer Concentrates | Clinton | MA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| PCPolymerine CO INC | New Bedford | MA | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| PLPolymerine LTD | New Bedford, City of | MA | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
