Please let us know how we can help you!

+43 3144 706

Contact form

Please, add your first item to the enquiry basket

Product has been added
View enquiry basket
Close window
Only the best for our customers


Both the production and quality controls of our European production facilities are subject to strict guidelines. Thanks to group-wide standardized quality processes, our plants can support each other and thus react flexibly to customer requirements.

Stoelzle quality management

Standardized, group-wide quality processes in our production plants lead to a consistently high level of production quality.

Piktogramm von 3 Sternen

Our quality standards

One person operate a check point in production
Quality in processes and products
  • Quality inspections in accordance with the European, Japanese and US-pharmacopeia
  • Regular checks of heavy metal content
  • Microbiological and particle testings
  • Comprehensive quality controls with state-of-the-art inspection machines
  • Top-class, cutting-edge production and quality testing facilities
The control parameters are displayed via a screen
Quality standards
Stoelzle aspires toward the constant improvement of its process capability. Our employees, as well as digitalisation and improvement measures, shall support us in this endeavour and we continuously invest in first-class inspection machines and state-of-the-art production systems.

  • ISO 9001
  • ISO 15378 (GMP)
  • Active Drugmaster File at FDA and Canada
One person checks the petri dish with a magnifying glass
Microbiological laboratory
Regular participation in comparative/ring trials (within the Stoelzle Glass Group and with external laboratories) ensures a constant high quality and accuracy of the testing procedures. The tests performed in the microbiological laboratory are focused on three fields:

  • Microbiological- and particle purity of the produced containers
  • Environmental monitoring of microbiological and particle count of the air
  • Monitoring of the hygienic behaviour of the employees
Person is checking the raw materials in the chemical laboratory
Chemical laboratory
In our well-equipped chemical laboratory, we have years-long experience in a variety of tests for quality assurance and production support. These tests include:

  • Determination of hydrolytic resistance (inner surface and glass grains) according to the latest versions of E.P./USP, ISO 4802-1 and ISO 719
  • Measurements of glass colour parameters and density
  • Monitoring of selected raw material parameters (e.g. content of iron, alumina, sulphate)
Graphic to show our technical customer service
Technical customer service
We support our customers before, during and after bottling. With proactive customer visits, we enable a smooth and hassle-free conversion to new items. We are also happy to provide you with technical support for on-site test bottling.

Benefit from:
  • A global network of client advisors
  • Our technical customer service
  • Pro-active customer visits and support

Continuous improvement

As Stoelzle team we are constantly working on optimizing our processes. In order to increase our efficiency, we use a variety of in-house systems:

  • Stoelzle Ideas Management: Ideas and suggestions coming from Stoelzle employees.
  • CAPA: We solve problems and identify causes using a structured method.
  • Plan, do, check, act (PDCA): We work according to the PDCA model to optimize our group-wide quality management.
  • Training & Qualification: Group-wide training for our employees.
  • Zero-error strategy: Our corporate culture and standards support error-free processes.

Stoelzle employees is working on a computer
Webinars by Stoelzle

Join our Expert Talks series and learn more about current and upcoming industry news.

Watch now

Thank you!

Your message has been sent.

You are subscribed to the Pharma Health & Safety Newsletter.

Your web browser (Internet Explorer) is out of date and should no longer be used for security reasons. Please install the current Microsoft browser (Microsoft Edge) to display this page correctly. Thank you!