Each year, approximately 300 kg of Active Pharmaceutical Ingredients, from 100 grams to 150 kilograms, leave our company and are delivered to customers in 21 countries on 5 continents. Our team has significant experience in route development, optimization, scale-up pilot, and commercial scale chemistry for GMP and non-GMP productions.


  • Doxorubicin Hydrochloride

  • Epirubicin Hydrochloride

  • Idarubicin Hydrochloride

  • Valrubicin


  • Nelarabine

API production

Our activities are under full compliance with the worldwide valid cGMP regulations. We can develop a manufacturing process for New Chemical Entities (NCE) and/or supply the active pharmaceutical ingredients for all phases of a drug’s life cycle, beginning with material for the first clinical studies up to the commercial supply. We assure the highest, consistent quality of our APIs to enable you to run an effective process for the production of your finished drug forms.

Quality system

Gemini PharmChem Mannheim GmbH implemented a Quality System to ensure product quality and patient safety throughout the entire life cycle of our products, which targets all relevant stages of material management, process development, scale up, and commercial API manufacturing and quality control.

Our Quality System is designed to fulfill EU GMP, FDA, and customer requirements.

Our management will be happy to answer your questions.

About Us

Gemini PharmChem Mannheim GmbH is a pharmaceutical company that focuses on modern manufacturing of Active Pharmaceutical Ingredients (APIs). The headquarters – Synbias Pharma AG – are located in Schaffhausen, Switzerland, with our manufacturing and R&D site in Mannheim, Germany.

Gemini PharmChem Mannheim GmbH primary specialization is developing and manufacturing highly potent APIs, mainly used for cancer therapy, including Anthracyclines, Nucleosides and Plant alkaloids. We can produce APIs according to the specific requirements of our customers. We optimize the production processes based on many years of experience and practice.


Sandhoferstrasse 96,

68305 Mannheim,