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Reagenzgläser / Test tubes

REXIM® amino acids for
pharma and biopharma

Rexim® amino acids and derivatives support API synthesis, biopharma processing, and advanced nutraceuticals. We produce them under cGMP based on ICH Q7 guidelines. ISO based quality systems, plus EXCiPACT™ and FSSC22000 site standards, help meet high healthcare quality needs. We also support you with chemistry, risk management, and quality services. With supply chain transparency, consistency, and secure supply, Rexim® helps you build advanced healthcare products with strong performance and reliability.

  • Rexim® amino acids and derivatives are positioned for API synthesis, biopharma processing, and advanced nutraceutical applications.
  • Rexim® products emphasize high quality production under cGMP based on ICH Q7 guidelines for healthcare uses.
  • Rexim® manufacturing and site operations follow ISO-based quality systems plus EXCiPACT™ and FSSC22000 standards.
  • Evonik highlights supply chain transparency, consistency, and support services for chemistry, risk management, and quality needs.
  • Evonik presents Rexim® offerings as a secure and reliable supply option for advanced healthcare product development.

Amino acids are often referred to as the building blocks of life. As a core constituent of proteins, amino acids play a vital role in a range of biochemical processes that govern our metabolism and health.

When these amino acids are manufactured and purified to the highest quality standards, they become an essential ingredient in countless products used across areas including medical nutrition, nutraceuticals, APIs, excipients, cell culture and many more applications.

For more than 60 years, Evonik has been one of the world’s leading and most trusted suppliers of pharmaceutical amino acids. In the production of our REXIM® amino acids, we combine large‑scale fermentation, enzymatic bioconversion, and chemical synthesis with advanced purification technologies at two reliable manufacturing sites in Europe and Asia, ensuring highest‑purity, pharma‑grade consistency and offering value‑added services for amino acids, salts, and derivatives.

Our amino acids are available in different grades and being used amongst different application areas:

Our amino acids, salts & derivates at a glance

Please note: All of our products are available in different grades.

Amino acidCAS number 
DL-Methionine59-51-8 
Glycine56-40-6 
L-Alanine56-41-7 
L-Asparagine monohydrate5794-13-8 
L-Aspartic acid56-84-8 
L-Glutamic acid56-86-0 
L-Leucine61-90-5 
L-Lysine Acetate57-282-49-2 
L-Lysine hydrochloride657-27-2 
L-Lysine monohydrate39665-12-8 
L-Methionine63-68-3 
L-Ornithine-L-Aspartate3230-94-2 
L-Phenylalanine63-91-2 
L-Proline147-85-3 
L-Serine56-45-1 
L-Threonine72-19-5 
L-Valine72-18-4 
N-Ac-DL-Methionine1115-47-5 

Amino acids to meet your requirements

Our amino acids fulfill your safety, quality and regulatory requirements. Evonik holds the necessary certifications to satisfy strict quality and regulatory standards for the manufacture of highly pure pharmaceutical amino acids and derivatives. Our manufacturing sites in France, Slovakia and China have a strong regulatory record with the FDA and other notified bodies. We are also in compliance with all monographs across key global markets such as the U.S., Europe and Japan, and certified to ICH/Q7a (Good Manufacturing Practice of APIs), ISO 22000, and the stringent infant medical nutrition standard Food for Special Medical Purpose (FSMP).

In addition, our quality systems adhere to HACCP, Halal and Kosher requirements. With every batch we provide Certificates of Analysis. Our unrivalled history of production excellence makes us a reliable choice for the consistent supply of high-quality pharmaceutical amino acids.


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