Polymer and small molecules, custom manufactured or adapted from catalog products, for vapor and printing processes

Seqens manufactures high-purity photo-and electro-active chemicals while offering reliable processes to answer custom needs for the production of OPD, OPV, OLED, OFET and OTFT materials. Our expertise in bringing lab innovations to industrial production guarantees time-to-market optimization.

Supporting material innovation

Seqens has more than 30 years of experience in developing and manufacturing specialty chemicals for electronics, directly benefiting from PCAS and Saint-Jean Photochemicals history. Thanks to seasoned scientists and state-of-the-art lab equipment, we are able to support development of electro- and photo-active materials. We also partner with technical and academic players to level up chemical process optimization, fine tune analytical methods, and carry out applicative testing.

Seqens supports material innovation for Organic PhotoDetectors (OPD), Organic PhotoVoltaic (OPV), Organic Light Emitting Diodes (OLED), Organic Field Effect Transistors (OFET), and Organic Thin Film Transistors (OTFT). We offer polymers and small molecules integrating the composition of active and transport layers, as well as electrodes and substrate materials. Our variety of tailor-made semiconductive and conductive molecules and polymers encompass polycarbazoles, polythiophenes, polyanilines, polyfluorenes, polypyrroles, and heterocyclic aromatic compounds. Along with our custom manufacturing offer, we specifically supply well renowned and patented polycarbazole derivatives such as PCDTBT.

tailor-made industrialization

Seqens is a favorite partner to bring new solutions to industrial scale with the best quality and the guarantee of an optimized time to market. Our teams closely collaborate with customers to understand their requirements and major hurdles all along the project. Favoring development success, we act transparently and put at your disposal our extensive industrialization process know-how.

Operating kilo-lab, pilot, and industrial production facilities, Seqens definitely is a key partner for scale-up support. We are able to conduct a wide range of chemical syntheses including cryogenic processes thanks to specific and flexible production equipment. From early stage to industrial scale, our chemical scientists develop and optimize analytical methods to guarantee the best follow-up of the product specifications.

Accessing to microelectronics standards and expertise

Seqens top-notch quality is its signature. We engage for results in both high purity level and down-to-ppt low metals process and we are proud to be acknowledged as one of the best-in-class advanced specialties manufacturer for microelectronics.

Seqens applies its quality excellence to printed and organic electronics products. We tightly control molecular weight distribution and viscosity, while assuring both reproducibility and reliability of our processes under an ISO 9001 quality system including in-control quality monitoring. We endorse stringent quality control and assurance of raw materials and final products quality control. We implement customer-oriented statistical process control (SPC) and statistical quality control (SQC).

Our locations

Address PCAS, ZI de Limay 2, 8 Rue de Rouen
78440 Porcheville
Phone +33 1 34 79 57 00
Market Pharmaceutical, Specialty Ingredients & Cosmetics
Email ContactSeqensPCV@seqens.com
More information

Surface: 40, 000 m²

Lab surface: 2, 000 m²


  • 4 kilo-labs
  • 2 cGMP pilot plants with 11 multipurpose reactors from 100 L to 2, 800 L (total capacity of 12 m³)
  • Temperature range: -15/+150°C  (hastelloy reactor: -80/+200°C)
  • 3 finishing rooms (agitated filter dryers, filters, dryers, milling and sieving equipments)

Flagship technologies:

  • Crystallization expertise and technologiesd(salt, co-crystal and polymorph screenings, process development)
  • Process Safety expertise and tecnologies
  • Flow chemistry for fine chemicals
  • Potent API process development
  • Genotoxic Impurities
  • Issue Management
  • Generic A.P.I Solid state expertise

Last inspection: ANSM  October 2018

Certification: GMP

Number of scientists: 110

Other: Ecosystem Pharma with integrated services

Address PCAS, 15 Avenue des Frères Lumière
38300 Bourgoin-Jallieu
Business Line Contract Manufacturing & Fine Chemicals
Phone +33 4 74 93 63 33
Market Pharmaceutical
Email Accueil.bourgoin@seqens.com
More information

Flagship technologies: Distillation

EcoVadis CSR Rating: Gold Certification

Address PCAS, Route de Lassay
61410 Couterne
Business Line Lubbricant Additives, Fine Chemicals
Phone +33 2 33 37 50 20
Market Specialty Ingredients
Email info.AS@seqens.com
More information

Surface: 120, 000 m²


Capabilities: 190 m³ of ISO 9001 reactors and kilo-lab

Flagship technologies: Most standard organic synthesis reactions (large volumes)


Address PCAS, 725 rue Trotter
QC J3B8J8 Saint-Jean-sur-Richelieu
Business Line Electronics
Phone +1 450 348 09 01
Market Specialty Ingredients
Email Maxime.Garayt@seqens.com
More information

Surface: 15, 500 m²

Lab surface: 200 m²

Flagship technologies: 

  • Monomers and polymers Heterocycles
  • Polyphenol and azo dyes (with a low metal content)
  • Photo-active compounds (PAC) / photo-active generators (PAG)
  • Cyanine-based dyes
  • NOVOLAK and phenolic resins
  • Silicon chemistry (polysiloxane)
  • Anthracene derivatives (microelectronic grade)

Last inspections: ISO 9001 February 2019


Number of scientists: 8

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