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SOTAX is a global leader in providing high-quality dissolution testing systems, automated sample preparation workstations for content uniformity, assay and blend uniformity testing, as well as physical tablet testing instruments for the pharmaceutical, dietary supplement, medical device and biopharmaceutical industries.

Since its foundation in 1973, SOTAX has grown considerably from a small engineering company to its current position as a global leader in tablet testing technologies. SOTAX still remains a privately owned independent company. Globally, the SOTAX Group is represented by local SOTAX subsidiaries (USA, Canada, Switzerland, Germany, France, Italy, Great Britain, Czech Republic, India and China) and distributors dealing with sales, service and validation of instrumentation. SOTAX also offers technical and analytical services.

Continued growth has been cemented by the acquisition in 2008 and 2013 of the Zymark (fully automated dissolution and sample preparation workstations) and Dr. Schleuniger® Pharmatron (physical tablet testing technologies) brands respectively. The success of SOTAX can be attributed to the strong commitment for continual product improvement. SOTAX design concepts allow for customization of the pharmaceutical testing systems for specific needs; for example, the new Xtend™ Dissolution Line for tablet testing:

For customers, the ability to flexibly respond to permanent change in today’s fast-paced pharmaceutical environment can make the difference between success and failure. Fast time-to-market requirements, outsourcing, relocations, shift of manufacturing capacities and short return on investment considerations ask for equally flexible testing solutions in R&D and quality control laboratories.

The new and fully modular and scalable Xtend™ concept is 100% based on this basic premise and allows lab scientists to tailor tablet dissolution testing to both their current and future needs – making their investment future-proof. This new concept consists of new individual and standardized Xtend™ modules which can be flexibly combined for different customer requirements.

Nordring 1
4147 Aesch
Phone: +41 61 487 54 54
Fax: +41 61 482 13 31

Content Uniformity Testing

Sample preparation can be a very general term. When we talk about sample preparations at SOTAX, we are referring to the volumetric preparations of API, solid/liquid oral dosage forms, creams, and pastes.

Automated sample preparation enhances laboratory productivity by minimizing resource allocation for repetitive tasks such as sample weighing, extraction, filtration, dilution, and transfer to analysis devices. This enables the re-purposing of lab staff to mission-critical tasks such as data analysis, reporting, and notebook documentation. Automated procedures can also reduce solvent usage and hazardous waste generation while…

Dissolution Testing

Dissolution is a test used by the pharmaceutical industry to characterize the dissolution properties of the active drug, the active drug's release and the dissolution from a dosage formulation. Dissolution testing is used to formulate the drug dosage form and to develop quality control specifications for its manufacturing process. An in-vitro dissolution test is a critical test that has to correlate with in-vivo clinical studies and which could require specific method developments. Dissolution testing is described in many pharmacopeias, in EP, USP chapters and FDA guidelines.

USP nomenclature for compendial apparatus for dissolution testing includes USP 1 baskets, USP 2 paddles, USP 3 reciprocating cylinders, USP 4 flow through cell, USP 5 paddle over disk, USP 6 cylinders, USP 7 reciprocating holders. While tablets are usually tested in a classical dissolution bath with the USP 2 paddles method, floating capsules and…

Physical Testing

Dr. Schleuniger® Pharmatron, a member of the SOTAX Group, provides solutions to test the physical properties of tablets, capsules and other solid dosage forms. With a proven track record of more than 20,000 testers in the market, Dr. Schleuniger Pharmatron branded tablet hardness testers and disintegration testers are known for their reliability, precision and ease of operation.

Dr. Schleuniger® Pharmatron products measure the following parameters:Hardness: tablet hardness testers and automated tablet testing systems for laboratories and in-process control (IPC)Disintegration: tablet disintegration testers with manual and automatic end-point detection; bath-less system availableFriability: single and dual drum friability tester with balance interface; automatic calculation of percent friabilityTap density: tap density tester for EP, ASTM,…

Global Services

Since its foundation in 1973, SOTAX has built an excellent reputation as a specialist in the manufacture of innovative, sophisticated and long-lasting instruments and systems for pharmaceutical testing, establishing the company as the leader in this technological field. To support this, SOTAX is certified for ISO 9001. For decades, customers have trusted our high-quality services and instrumentation.

As a leading instrumentation brand and customer-oriented equipment supplier, SOTAX also needs a perfect service and therefore offers a comprehensive portfolio:Technical and compliance servicesRental and leasing servicesR&D analytical servicesTraining and support servicesIn service, few things are as important as the experience of your team, and over the years, real people providing real service have helped…
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