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High Quality Specialty Chemicals



Strem established in 1964, is a company that manufactures and markets specialty chemicals of high purity. Strem was acquired by Ascensus Specialties in 2021. Its clients include academic, industrial and government research and development laboratories as well as commercial scale businesses in the pharmaceutical, microelectronic and chemical / petrochemical industries. Strem also provides custom synthesis (including high pressure synthesis) and cGMP manufacturing services.


Strem is located in Newburyport 38 miles (60km) north of Boston, Massachusetts, USA. This facility covers 48,000 sq. ft (4,460 m2). Its cGMP facility is FDA inspected. The European office and warehouse are located in Bischheim, France.

Expertise and Experience in Manufacturing High Purity, High Quality Chemicals



Our mission: Deliver high-purity specialty chemicals promptly. Quality is paramount. Most products are 99% pure, with some reaching 99.9999% metals purity

In research, reliance on supplier quality is crucial. Strem's rigorous procedures and tailored analytical techniques ensure top-notch quality. Our catalogs always include "Color and Form" as primary quality indicators.



Long Term Focus in Inorganics, Organometallics and Metals

Strem offers over 6,000 specialty products in the area of metals, inorganics, organometallics and nanomaterials.


Its first commercial product was cobalt carbonyl, manufactured in Strem's high pressure autoclaves. The first catalog also contained catalysts/precatalysts and phosphorus ligands, which continue to be important classes of products offered by Strem.


Key product lines include metal carbonyls, metal catalysts for organic synthesis, ligands, especially phosphines and N-heterocyclic carbenes, metal organic chemical vapor deposition (MOCVD) and atomic layer deposition (ALD) precursors and nanomaterials. Many products are also available on a bulk basis.

Our Product Portfolio

  • Metal foils, wires, powders & elements
  • Metal halides & hyrides
  • Metal oxides, nitrates & chalcogenides
  • Metal acetates & carbonates
  • Precious metails & rare earth chemicals
  • Fullerenes
  • Catalysts & chiral catalysts
  • Organometallics
  • Organophosphines & arsines
  • Organofluorines
  • Metallocenes



  • Porphines & phthalocyanines
  • Metal carbonyls & derivatives
  • Ligands & chiral ligands
  • Metal alkoxides & beta-diketonates
  • Metal alkyls & alkyl amides
  • Volatile precursors for MOCVD & CVD and ALD
  • Electronic grade chemicals
  • Stainless steel bubblers for CVD
  • Ionic liquids
  • Nanomaterials
  • Metal Scavengers

Rapid Customer Service

Strem's large inventory of research chemicals allows most orders to be shipped the same day they are received. If same day shipment is not possible, expected shipping dates are provided and customers are kept informed of order status.

Technical service is provided with the same enthusiasm and speed to ensure that customers have the chemicals and information they need.



ISO 9001:2015 Certified

Our site in Newburyport, Massachusetts was ISO 9001:2015 certified by NQA (National Quality Assurance) for Quality Management System (QMS) standard. Our mission has always been to provide high quality specialty chemicals and outstanding customer service. This certification allows our customers to have even more confidence in our ability to meet the standards they have grown to expect from Strem products and services.

New Products and Proprietary Technologies


Strem has a history of collaborating with academic scientists which has led to the introduction of new products. Industrial partnerships have also led to the introduction of proprietary technologies and facilitated their commercialization. Suggests for new products are gladly received.

Strem Chemicals Supports Innovation

We sponsor the American Chemical Society Award for Distinguished Service in the Advancement of Inorganic

Chemistry and the Canadian Society for Chemistry Award for Pure or Applied Inorganic Chemistry.

Environmental, Health,

Safety and Security Program

We are a member of SOCMA (Society of Chemical Manufacturers and Affiliates) and we are committed to the ChemStewards® program. ChemStewards is an adaptable environmental, health, safety and security (EHS&S) program that promotes continuous performance improvement in batch chemical manufacturing. Strem has received Gold, Silver and Bronze Improvement Awards in 2011-2019, 2021, as well as an award for Educational Outreach sponsored by the Chemical Educational Foundation.


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