What is micronization?

​Pharmaceutical Micronization is an advanced technique that allows to reduce the dimensions of particles of an active pharmaceutical ingredient or an eccipient.

How is micronization carried out?

The material is injected under high pressure in a griding chamber using gas flow ( compressed air or nitrogen). The particles of the material dragged by the flow at very high speed, due to the geometry of the chamber, are subjected to speed and direction variations with auto collision and consequent dimension reduction to values settled by the operative condition of the process.

Why micronization is used?

Micronization is used to follow the particle size requirements for the active ingredient and /or excipients, necessary to fit the formulation parameters on the final dosage form.

When is it necessary to resort to micronization?

Micronization is used to meet the particle size requirements of the active ingredients and excipients, steroids micronization, hormones micronization, particle size reduction,  parameters that are very often fundamental for the formulation of the finished product and necessary for obtaining the desired bioavailability of the same.

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Custom-made process solutions with IMS SRL MICRONIZATIONS

The Milan-based company, since 1973, has specialized in the micronization of active ingredients and excipients for the pharmaceutical industry and has performed out-sourcing activities for the micronization of pharmaceutical powders.

This position, achieved through the vast experience gained over the years, puts IMS SRL as a supplier of Pharmaceutical Chemical Laboratories in Europe.

Our mission is to offer a service, realizing tailor-made process solutions, which means that they are customized according to the demands and needs of each client.

In fact, thanks to the continuous research of new technologies, IMS can propose and elaborate made-to-order projects according to the specific needs of its Partners, guaranteeing maximum support during all phases of evaluation, production process, analysis, and after-sales.

IMS’ core competence in this area is the ability to evaluate and determine the best solution for the micronization of an active ingredient or excipient (API, HPAP) by organizing the testing and experimentation for a specific product.

Product processing – considering the complexity of the production and the formulation requirements necessary to produce a drug that complies and fully meets regulations – is carried out by IMS SRL in a careful and meticulous manner.

Because of this, the company operates by giving utmost attention to:

  • Cross-contamination: there cannot be any residue between the manufacturing of an active ingredient and the following. This is a fundamental and decisive step.
  • Cleaning study: the machinery is washed thoroughly at the end of each processing and checked.

For this reason, the micronization of active ingredients and excipients requires experience, knowledge, and professionalism.

This is why IMS SRL, with its multi-year activity in the field, has made its way over the years by becoming a synonym of reliability, guarantee and competence for its customers.


1- Feasibility Studies

Batch size: 10 gr – 50 gr

Apparatus: labmill

Timelines: about 2-3 days

2- Scale -up

Batch size: 100 gr – 10 kg

Apparatus: jet mill Ø 100, 200mm (4, 8 inch)

Timelines: about 1 week

3-Full production

Batch size: 1Kg – 1000 kg

Apparatus: jet mill Ø 100, 200, 300 mm (4, 8, 12 inch)

Timelines: 1-2 weeks

4-Analytical services

Our equipment

To meet our customer’s needs, IMS can counts on a large number of GMP qualified equipment, just to guarantee the top flexibility for quantity and/or activity. We can offer our services starting from few grams to 15Kgs in Glove Box isolator.

Request from R&D labs can be complied thanks to a new Ø 4” equipment for 1 or 2 gr. tests

We aim to quality:

A complex HVAC system regulates the temperature, humidity and overpressure inside the production department. The particle contamination in the production areas is Class 7 (at rest) according to ISO 14644-1 (10000 Federal Standard). To avoid cross-contamination each box and its own SAS have a dedicated air inlet and expulsion group. Each box has an independent conditioning system. In each system the air is introduced through the EU14 HEPA filters (eff. D.O.P. 99.999%). The air extraction takes place through grates with prefilter EU9 (eff. 95% calorimetry), and subsequently with EU13 filters (eff. D.O.P. 99.997%); lodged in a canister with bag in – bag out device. Each box is kept in depression respect to the SAS. This geometric arrangement has been studied with the aim to avoid cross-contamination and leakage of the dust from the system.
The compressed air generated by a compressor, is filtered, oil free, dried and distributed to the working areas through a stainless steel line Ø 3 “.
The liquid nitrogen is stored in a 30,000 liter tank.
After evaporation through the heat exchanger, it is distributed to the working areas through stainless steel line Ø 2 “. The gases are filtered before use through a HEPA filter. The system has been qualified and air and nitrogen quality is constantly monitored
In the CQ laboratory , where highly skilled and trained staff work, we can perform particle size powders analysis by dry and wet laser technique. Laboratory instruments and equipment are qualified and regularly calibrated. Powders can also be examined using optical microscope and the data collected are processed through an image analysis software. The quality of the micronized material is constantly monitored during the production process. QC establishes sampling plans and analytical methods to verify that products conform customer specifications. All laboratory tests are performed and documented at the time of performance, deviations from written procedures are documented and justified. Particle size analysis is conducted on each production batch by laser diffraction technique, particle size is performed on starting material, IPC and final product. To determine satisfactory conformance to established specifications .
Identified reserved samples of startingmaterial and representative of each micronized batch are retained for six years according to internal procedure. Analytical methods are validated according ICH2 and follow the customer requirements.
Quality Assurance carries out periodically self-inspections to check the strict observance to GMP and ISO, sets up the Quality system logics and philosophy , defines the procedures that regulates the Quality System.
All operations are documented in a quality assurance plan that requires that:
· processe, cleaning procedures and analytical methods are validated;
· Equipment, utilities and HVAC system, are qualified;
· All processes are fully documented.

Pharmaceutical plant



Analytical Laboratory


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The company IMS  has extensive experience in the field of active ingredients and excipients micronization , with a large  portfolio of non-european and european customers.


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