Release testing

... of raw materials, intermediate products or finished medicinal products at rapid performance of the analyses and in high quality.

Stability testing

From the planning stage to the documentation, we undertake the entire procedure of stability testing on active substances and finished medicinal products.

Method development and validation

HHAC can draw on 30 years experience in method development.



For determination of the dissolution rate, a considerable quantity of equipment from various manufacturers is available in our equipment park.

The GMP contract laboratory – HHAC Labor Dr. Heusler GmbH

HHAC Labor Dr. Heusler GmbH is a private-sector, independent service laboratory offering a wide range of analytical services for the development and quality control of medicinal products.

Our work is based on experience with more than 400 active substances in a wide variety of dosage forms. We analyse both synthetic active pharmaceutical ingredients (APIs) and herbal active substances in solid, semi-solid and liquid preparations.

Our range of client services includes

    • Release testing
    • Stability testing
    • Storage in an environmental chamber in compliance with the International Conference on Harmonisation (ICH)
    • Method development to method validation
    • Method transfers
    • Advice on Good Manufacturing Practice (GMP)

The time factor plays an important role. For expedited product development and market access, we support our clients with the fastest possible processing of the assigned tasks.

All work is performed under controlled GMP conditions. The company operates a comprehensive quality management system based on GMP and DIN EN ISO/IEC 17025.