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Broad methodological competence – efficient order processing – high level of commitment to our customers: These are the foundations on which HHAC Labor Dr. Heusler has established itself as a reliable partner to the pharmaceutical industry since 1992.

We offer our customers a wide range of laboratory services in the field of production, development and quality control, mainly of pharmaceuticals, but also of cosmetics and medical devices.

are crucial for our clients to secure their own workflow.

Therefore, we support our customers with as fast as possible processing of the assigned tasks – while ensuring the highest quality.

is reflected in the partnerships we have built up with our customers over many years and decades. Reliability and precision of our work are our strongest arguments for this.

Release testing

Whether release testing for raw materials, intermediate products, finished drugs, medical devices or cosmetics: We guarantee fast, precise and highly reliable results.

Climate storage

For the storage of test samples according to ICH, qualified climate facilities under controlled storage conditions are available.

Method development/validation

We develop customized methods for robust, reliable routine operation and perform validations of purity, assay and dissolution testing, among others.


We are your sparring partner for scientific and technical consulting on analytical or stability testing, chemical-physical or microbiological issues as well as QM topics.

Stability testing

From planning to final documentation: we are specialists in stability testing of active pharmaceutical ingredients, finished drugs, medical devices and cosmetics.

Highly active substances

Handling highly active substances requires both specific know-how and a specially equipped working environment. HHAC offers you both.

Dissolution testing

We have many years of experience in the development and validation of methods for dissolution testing and analytical determination of active substances.


We offer the strong combination of analytics and stability testing of narcotics, based on our long experience and compliance with all regulatory and technical requirements.

The special quality of our work

  • is based on our decades of work in pharmaceutical analysis and the experience we have gained in analyzing more than 400 active pharmaceutical ingredients in different dosage forms.

  • is demonstrated by our repertoire of analytical methods, which we have further developed and optimized over this period with the support of state-of-the-art laboratory technology.

  • is verified by comprehensive quality management, thus permanently guaranteeing the validity and precision of our results.