Connecticut's chemical manufacturing sector is a vital component of the state's economy, focusing on innovative materials and processes. Companies in this industry produce a wide range of products from specialty chemicals to custom formulations for various sectors such as pharmaceuticals, agriculture, and food processing. Sustainability increasingly shapes the industry's future, as manufacturers adopt eco-friendly practices and develop alternatives to traditional materials. With advancements in technology and a growing emphasis on green chemistry, the sector is evolving rapidly, meeting consumer demands while ensuring compliance with rigorous regulations. This transformation heralds a promising horizon for firms dedicated to responsible growth.

The chemical manufacturing companies in Connecticut range from well-established firms to innovative start-ups, varying in size from small teams to thousands of employees. Headquartered in cities like Waterbury, Norwalk, and Danbury, many of these companies were founded in the early 20th century. They specialize in sectors such as electronics, agriculture, and personal care, offering unique products like surface finishing chemicals, lubricants, and agricultural solutions. Their commitment to quality and sustainability indicates a progressive trend in a competitive market, reflecting a continuous adaptation to industry regulations and consumer preferences.

Continue reading to learn more about Connecticut's top chemical manufacturing companies.

Top 21 Chemical Manufacturing Companies in Connecticut

1. MacDermid Performance Solutions

• Website: macdermid.com
• Ownership type: Corporate
• Headquarters: Waterbury, Connecticut, United States (USA)
• Employee distribution: United States (USA) 20%, United Kingdom (UK) 16%, Italy 14%, Other 50%
• Latest funding: $1.8B, October 2013
• Founded year: 1922
• Headcount: 5001-10000
• LinkedIn: macdermid-alpha-and-enthone-business-group

MacDermid Performance Solutions, based in Waterbury, Connecticut, is a specialty chemical company that has been serving various industries since its founding in 1922. The company specializes in providing innovative chemical solutions tailored for sectors such as electronics, automotive, and offshore energy. Their product offerings include surface finishing chemicals, wastewater treatment solutions, and flexographic printing equipment. MacDermid is particularly noted for its commitment to enhancing product performance and sustainability, which resonates with the growing demand for environmentally responsible manufacturing practices. With a workforce of approximately 637 employees and a presence in key markets around the world, MacDermid continues to play a significant role in the chemical manufacturing industry, supporting businesses that require advanced chemical solutions to meet their operational needs.

2. R. T. Vanderbilt Co.

• Website: rtvanderbilt.com
• Ownership type: Private
• Headquarters: Norwalk, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1916
• Headcount: 501-1000
• LinkedIn: r.-t.-vanderbilt-co.

R. T. Vanderbilt Holding Company, Inc. is a private chemical manufacturer and mineral supplier based in Norwalk, Connecticut. Founded in 1916, the company has built a strong reputation for providing high-quality raw materials and technical support across various sectors, including petroleum, rubber, plastics, pharmaceuticals, and personal care. Through its subsidiaries, such as Vanderbilt Chemicals, LLC and Vanderbilt Minerals, LLC, the company operates manufacturing and mining facilities in several states, including Kentucky, Connecticut, and New York. R. T. Vanderbilt is dedicated to meeting customer needs while adhering to industry standards, and it is certified under the ISO 9001 standard and the American Chemistry Council’s Responsible Care® initiative. Their extensive experience and commitment to quality position them as a significant player in the chemical manufacturing industry.

3. Miller-Stephenson Chemical Company

• Website: miller-stephenson.com
• Ownership type: Private
• Headquarters: Danbury, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1955
• Headcount: 51-200
• LinkedIn: miller-stephenson-chemical-company

Miller-Stephenson Chemical Company, based in Danbury, Connecticut, has been a player in the chemical manufacturing industry since its inception in 1955. The company specializes in producing lubricants, release agents, coatings, and various specialty products. Their offerings cater to a range of applications, particularly in the aerospace and automotive sectors, where they provide solutions that enhance manufacturing processes. Miller-Stephenson prides itself on its technical expertise, offering custom solutions and robust technical support to meet specific client needs. The company maintains a strong inventory across its East and West Coast locations, ensuring efficient delivery and service. Their commitment to innovation is evident in their development of eco-friendly products, responding to regulatory demands and market expectations for sustainability. With a dedicated workforce and a focus on high-performance chemical solutions, Miller-Stephenson continues to be a relevant entity in the chemical manufacturing space.

4. Brand-Nu Laboratories, LLC

• Website: brandnu.com
• Ownership type: Private
• Headquarters: Meriden, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1956
• Headcount: 11-50
• LinkedIn: brand-nu-laboratories-inc.

Brand-Nu Laboratories, LLC, headquartered in Meriden, Connecticut, is a chemical distributor and manufacturer that has been operational since 1956. The company specializes in high purity chemicals, catering primarily to the pharmaceutical, biotechnology, and microelectronics sectors. With a workforce of approximately 27 employees, Brand-Nu focuses on delivering custom formulations and a broad array of chemical products. Their commitment to quality is underscored by their ISO 9001:2015 certification, ensuring that they meet rigorous industry standards. In 2020, Brand-Nu became part of Caldic, a global specialty chemical distributor, which has further enhanced their distribution capabilities. The company operates a clean room facility and has established relationships with over 90 chemical manufacturers, allowing them to offer a wide selection of products while maintaining a focus on customer-specific solutions. Their operational model emphasizes quick delivery and compliance with customer requirements, making them a reliable partner in the chemical manufacturing industry.

5. King Industries Inc.

• Website: kingindustries.com
• Ownership type: Private
• Headquarters: Norwalk, Connecticut, United States (USA)
• Employee distribution: United States (USA) 98%, Other 2%
• Founded year: 1932
• Headcount: 201-500
• LinkedIn: king-industries

King Industries Inc. is a chemical manufacturer based in Norwalk, Connecticut, specializing in the design, production, and distribution of specialty additives. Established in 1932, the company serves a wide array of industries, including automotive, coatings, and lubricants. Their product lines include rust inhibitors, corrosion inhibitors, and various catalysts, which are essential for enhancing the performance and quality of branded products like engine oils and greases. King Industries prides itself on its technical expertise and customer support, providing tailored solutions to meet specific formulation needs. The company operates globally, with a significant presence in the United States and additional offices in Europe and Asia, reflecting its commitment to serving a broad customer base. Their focus on sustainability and regulatory compliance further underscores their role in the chemical manufacturing sector.

6. Nalas Engineering Services, Inc.

• Website: nalasengineering.com
• Ownership type: Private
• Headquarters: Essex, Connecticut, United States (USA)
• Employee distribution: United States (USA) 97%, United Kingdom (UK) 3%
• Founded year: 2008
• Headcount: 11-50
• LinkedIn: nalas-engineering-services-inc.

Nalas Engineering Services, Inc., founded in 2008 and based in Essex, Connecticut, is a private company that provides engineering services specifically for the chemical and pharmaceutical industries. The firm offers a comprehensive range of services, including synthesis and process development, process scale-up, manufacturing, and quality control. Nalas Engineering plays a crucial role in helping clients optimize their production processes, ensuring safety and compliance throughout. The company has recently expanded its capabilities, with plans to increase its manufacturing lines, indicating a commitment to growth and innovation. Their work often involves collaboration with various sectors, including defense and pharmaceuticals, showcasing their adaptability and expertise in handling complex chemical processes.

7. AXEL Plastics

• Website: axelplastics.com
• Ownership type: Family Owned
• Headquarters: Monroe, Connecticut, United States (USA)
• Employee distribution: United States (USA) 87%, Poland 7%, India 7%
• Founded year: 1941
• Headcount: 51-200
• LinkedIn: axel-plastics-research-laboratories-inc-

AXEL Plastics Research Laboratories, Inc. is a family-owned chemical manufacturer based in Monroe, Connecticut. Established in 1941, the company specializes in mold release agents and process aid additives tailored for the plastics, composites, rubber, and urethane industries. With a workforce of around 50 employees, AXEL operates on a global scale, supplying products to manufacturers across six continents. Their product offerings include a range of solutions designed to enhance production efficiency and product quality. The company has made significant strides in sustainability, recently installing a solar panel system to reduce its carbon footprint. AXEL is also certified with ISO 9001:2015 and is working towards additional certifications, underscoring its commitment to quality and environmental responsibility. Their history of innovation, customer focus, and ongoing product development further solidifies their position in the chemical manufacturing industry.

8. MacDermid Enthone Industrial Solutions

• Website: macdermidenthone.com
• Ownership type: Private
• Headquarters: Waterbury, Connecticut, United States (USA)
• Employee distribution: United States (USA) 16%, India 16%, Germany 9%, Other 59%
• Founded year: 1989
• Headcount: 1001-5000
• LinkedIn: macdermid-enthone-industrial-solutions

MacDermid Enthone Industrial Solutions, founded in 1989 and based in Waterbury, Connecticut, is a private chemical manufacturer that specializes in surface finishing solutions. The company offers a wide array of products designed to improve the durability and visual appeal of materials across various sectors, including automotive and electronics. Their product line includes anti-corrosion treatments, decorative coatings, and solutions for plastic recycling, all aimed at meeting stringent environmental standards and optimizing performance. MacDermid Enthone is also involved in wastewater treatment through their WaterCARE initiative, which focuses on effective water resource management. With a workforce distributed across several countries, including the USA, India, and Germany, the company maintains a significant global footprint in the chemical manufacturing industry.

9. Vanderbilt Chemicals, LLC

• Website: vanderbiltchemicals.com
• Ownership type: Private
• Headquarters: Norwalk, Connecticut, United States (USA)
• Employee distribution: United States (USA) 95%, Japan 5%
• Founded year: 1916
• Headcount: 201-500
• LinkedIn: vanderbilt-chemicals-llc

Vanderbilt Chemicals, LLC, based in Norwalk, Connecticut, is a private chemical manufacturer with a rich history dating back to 1916. Originally founded by Robert Thurlow Vanderbilt, the company has evolved significantly over the decades. Today, it specializes in producing a wide range of chemical products, particularly additives that enhance the performance and durability of materials in various industries, including petroleum, rubber, and plastics. With a portfolio that includes over 800 products across twelve different sectors, Vanderbilt Chemicals is dedicated to providing high-quality solutions tailored to the needs of its clients. The company operates manufacturing facilities in Bethel, Connecticut, and Murray, Kentucky, and maintains a strong commitment to environmental, health, safety, and security standards through its participation in ACC Responsible Care® guidelines. Their mission emphasizes building relationships and achieving sustainable growth through a culture of quality and innovation, which reflects their ongoing relevance in the chemical manufacturing industry.

10. Saskatchewan Mining and Minerals Inc.

• Website: saskatchewanminingandminerals.com
• Ownership type: Family Owned
• Headquarters: Chaplin, Connecticut, United States (USA)
• Employee distribution: Canada 100%
• Founded year: 1948
• Headcount: 51-200
• LinkedIn: saskatchewan-minerals-inc-

Saskatchewan Mining and Minerals Inc. (SMMI) is a family-owned company based in Chaplin, Saskatchewan, Canada, with a history dating back to 1948. The company specializes in the production of high-quality sodium sulphate and sulphate of potash, serving over 80 customers across North America and internationally. SMMI's sodium sulphate is utilized in various applications, including detergents, water treatment, and livestock mineral feed. The company operates from a strategically located facility that allows for efficient distribution by rail and highway. SMMI is dedicated to maintaining high standards of product quality, consistently achieving a minimum of 99% detergent-grade sodium sulphate. Their commitment to sustainability is reflected in their environmental initiatives, which aim to protect the unique ecosystem surrounding Chaplin Lake, where their operations are based. SMMI is also in the process of expanding its production capabilities to include sulphate of potash, a sustainable fertilizer, further solidifying its role in the chemical manufacturing industry.

11. Vanderbilt Minerals, LLC

• Website: vanderbiltminerals.com
• Ownership type: Private
• Headquarters: Norwalk, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1916
• Headcount: 201-500
• LinkedIn: vanderbilt-minerals-llc

Vanderbilt Minerals, LLC, based in Norwalk, Connecticut, is a mineral supplier and chemical manufacturer with a rich history dating back to 1916. The company specializes in providing high-quality mineral and chemical products tailored for various industries, including pharmaceuticals, personal care, agriculture, and industrial applications. With manufacturing facilities located across several states in the U.S., Vanderbilt Minerals offers a wide range of products, including smectite clays, wollastonite, and xanthan gum. Their products are essential for applications such as emulsion stabilization and rheology control. The company operates under strict quality standards, being ISO 9001 certified and participating in the Responsible Care Management System. This commitment to quality and customer service has allowed Vanderbilt Minerals to maintain a strong presence in the chemical manufacturing sector.

12. BioSafe Systems

• Website: biosafesystems.com
• Ownership type: Corporate
• Headquarters: East Hartford, Connecticut, United States (USA)
• Employee distribution: United States (USA) 93%, Canada 3%, India 3%
• Latest funding: April 2019
• Founded year: 1998
• Headcount: 51-200
• LinkedIn: biosafesystems

BioSafe Systems, founded in 1998 and based in East Hartford, Connecticut, is a chemical manufacturer dedicated to sustainable agricultural solutions. The company produces a variety of products, including algaecides, bactericides, fungicides, insecticides, and sanitizers, catering to agricultural producers and municipal water authorities. BioSafe Systems emphasizes the importance of sustainability in its operations, aiming to provide effective pest control while minimizing environmental impact. They have pioneered the use of peroxyacetic acid (PAA) in agribusiness, showcasing their commitment to developing safer alternatives to traditional chemicals. With a workforce of approximately 88 employees, the company operates multiple manufacturing facilities across the United States, ensuring a broad reach in the North American market. Their focus on innovation and sustainability has allowed them to adapt to changing market demands and consumer preferences, making them a relevant player in the chemical manufacturing industry.

13. Bomar

• Website: bomar-chem.com
• Ownership type: Private
• Headquarters: Torrington, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1990
• Headcount: 11-50
• LinkedIn: bomar-chem

Bomar is a private chemical manufacturer based in Torrington, Connecticut, established in 1990. The company specializes in advanced performance materials, focusing on oligomers and coatings designed for UV/EB applications. Bomar serves a global clientele across various industries, including 3D printing, nail coatings, and industrial coatings. Their products are tailored to meet specific performance requirements, showcasing their technical expertise in acrylate and urethane chemistry. Bomar also offers toll manufacturing services, assisting companies with custom blending and formulation needs. With a dedicated team and a commitment to innovation, Bomar continues to develop new materials that cater to emerging application technologies, ensuring they remain relevant in the chemical manufacturing industry.

14. U.S. Chemicals, LLC

• Website: uschemicals-wob.com
• Ownership type: Private
• Headquarters: Darien, Connecticut, United States (USA)
• Founded year: 1960
• Headcount: 1-10
• LinkedIn: u.s.-chemicals-a-woman-owned-business

U.S. Chemicals, LLC, based in Darien, Connecticut, is a private chemical supplier with a rich history dating back to 1960. The company specializes in custom processing and offers a broad array of chemical products tailored to meet the specific needs of various industries. With a workforce of around 15 employees, U.S. Chemicals prides itself on its customer-centric approach, emphasizing that their success is tied to the success of their clients. They maintain a robust inventory and have developed a network of contract service providers to ensure quick and efficient service. Their facilities are FDA registered and comply with Good Manufacturing Practices (GMP), which underscores their commitment to quality and safety. U.S. Chemicals also actively engages in corporate citizenship, supporting community initiatives and environmental sustainability. As a woman-owned business, they focus on fostering relationships and promoting inclusivity within their operations and supply chains.

15. Mott Corporation

• Website: mottcorp.com
• Ownership type: Corporate
• Headquarters: Plainville, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: $1.0B, July 2024
• Founded year: 1959
• Headcount: 501-1000
• LinkedIn: mott-corporation

Mott Corporation, founded in 1959 and based in Plainville, Connecticut, is a prominent provider of filtration solutions. The company specializes in advanced filtration and flow control systems, catering to a variety of industries including aerospace, healthcare, and food & beverage. Mott's product offerings include process filters, water reclamation systems, ultra-high purity products, and custom-engineered filtration solutions. Their engineering team collaborates closely with clients to develop tailored products that meet specific operational needs. Mott Corporation has also received significant funding, indicating strong investor confidence in their business model and growth potential. With over 60 years of experience, Mott continues to innovate in filtration technology, addressing complex challenges in chemical processing and other sectors.

16. P2 Science, Inc.

• Website: p2science.com
• Ownership type: Venture Capital
• Headquarters: Woodbridge, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: February 2023
• Founded year: 2011
• Headcount: 11-50
• LinkedIn: p2-science-inc-

P2 Science, Inc., founded in 2011 and based in Woodbridge, Connecticut, is a manufacturer specializing in sustainable ingredients for the beauty and personal care industry. The company was co-founded by scientists from Yale University, driven by a vision to replace traditional synthetic compounds with high-performance, eco-friendly alternatives. Their flagship product line, the Citropol® series, features innovative polymers derived from natural sources, particularly pine tree oil. P2 Science has established partnerships with brands and manufacturers across 25 countries, providing them with sustainable options for haircare, skincare, and color cosmetics. The company adheres to the principles of green chemistry, focusing on renewable feedstocks and low-energy manufacturing processes. P2 Science has received recognition for its contributions to the industry, including multiple awards for innovation and sustainability. Their commitment to environmental responsibility positions them as a relevant player in the chemical manufacturing sector.

17. Hampford Research Inc

• Website: hampfordresearch.com
• Ownership type: Private
• Headquarters: Stratford, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1982
• Headcount: 11-50
• LinkedIn: hampford-research-inc

Hampford Research Inc, based in Stratford, Connecticut, is a specialty chemical manufacturer founded in 1982. The company develops and produces customized chemical solutions tailored to the needs of various industries, including electronics, coatings, and dental applications. Hampford Research is known for its high-quality products, particularly photoinitiators and energy cured resins, which are critical in applications ranging from adhesives to dental restoratives. The company prides itself on its ability to support clients through joint research and development, scale-up processes, and contract manufacturing. With a dedicated team of chemists and engineers, Hampford Research has established itself as a reliable partner in the specialty chemicals market, serving a global clientele while maintaining a strong focus on customer service and continuous improvement.

18. AccuStandard

• Website: accustandard.com
• Ownership type: Private
• Headquarters: New Haven, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1986
• Headcount: 51-200
• LinkedIn: accustandard

AccuStandard, based in New Haven, Connecticut, is a private chemical manufacturer that specializes in analytical reference standards. Established in 1986, the company has carved out a significant niche in the production of certified reference materials for various applications, particularly in the pharmaceutical and environmental testing industries. AccuStandard offers a comprehensive range of products, including organic, petrochemical, and inorganic standards, as well as custom synthesis services tailored to meet specific client needs. Their commitment to quality is reflected in their adherence to international standards, holding certifications such as ISO 17034, ISO/IEC 17025, and ISO 9001. This dedication to quality ensures that their products enhance the accuracy of analytical testing across laboratories and research institutions. With a catalog that has grown to include over 12,000 reference standards, AccuStandard continues to support the analytical chemistry community with reliable and precise materials.

19. Bedoukian Research, Inc.

• Website: bedoukian.com
• Ownership type: Family Owned
• Headquarters: Danbury, Connecticut, United States (USA)
• Employee distribution: United States (USA) 94%, Switzerland 4%, Other 2%
• Founded year: 1972
• Headcount: 51-200
• LinkedIn: bedoukian-research-inc

Bedoukian Research, Inc., founded in 1972 and based in Danbury, Connecticut, specializes in the flavor and fragrance industry. The company produces a wide array of high-quality flavor and fragrance ingredients that cater to various sectors, including food, beverage, health, and personal care. With a workforce of approximately 116 employees, Bedoukian emphasizes innovation and quality in its product offerings. Their extensive experience in synthesizing flavor molecules has established them as a reliable supplier in the market. The company is also committed to sustainability, actively seeking to reduce its environmental footprint through responsible sourcing and manufacturing practices. Bedoukian's dedication to customer service and product quality has earned them a strong reputation among their clients, who appreciate their proactive approach and quick response times.

20. Oxylus Energy

• Website: oxylusenergy.com
• Ownership type: Venture Capital
• Headquarters: New Haven, Connecticut, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: Seed, $4.5M, September 2024
• Founded year: 2023
• Headcount: 1-10
• LinkedIn: carbon-loop-earth

Oxylus Energy, founded in 2023 and based in New Haven, Connecticut, is an energy technology company dedicated to creating a circular economy for carbon dioxide. The firm specializes in developing advanced technologies that capture and convert CO2 into green e-methanol and other valuable chemical feedstocks. Their innovative electrolyzer technology is designed to efficiently transform CO2 into carbon-neutral fuels, catering primarily to industries such as shipping and aviation that are seeking sustainable solutions to mitigate their carbon emissions. With a small team of around 15 employees, Oxylus Energy has already made strides in the commercialization of their technology, having secured $4.5 million in seed funding in September 2024. This funding supports their mission to make CO2 capture and conversion competitive and scalable, contributing to a decarbonized future.

21. Mantrose-Haeuser Co., Inc.

• Website: mantrose.com
• Ownership type: Private
• Headquarters: Fairfield, Connecticut, United States (USA)
• Employee distribution: United States (USA) 96%, Hong Kong S.A.R 4%
• Founded year: 1992
• Headcount: 51-200
• LinkedIn: mantrose-haeuser-co-inc-

Mantrose-Haeuser Co., Inc., founded in 1992 and based in Fairfield, Connecticut, is a manufacturer known for its expertise in edible coatings and specialty products. The company serves a variety of industries, including pharmaceuticals, food, and cosmetics, providing high-quality solutions that enhance product performance and shelf-life. Mantrose-Haeuser is particularly recognized for its extensive product line in the pharmaceutical sector, where it produces USP/NF and globally certified glazes. Their offerings also include confectionery coatings, food ingredients, and industrial solutions, showcasing their ability to cater to specific market needs. The company emphasizes innovation and sustainability, developing custom solutions that meet the unique requirements of its clients. Mantrose-Haeuser operates under the umbrella of RPM International, Inc., a larger specialty coatings company, which adds to its credibility and market presence.

Chemical Manufacturing Insights: Key Companies in Connecticut

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