What is a cleanroom classification?

A cleanroom classification defines how clean the air must be by setting limits for the number of airborne particles per cubic meter. Lower particle levels mean a cleaner environment and lower risk of contamination.

What is the difference between ISO and EU GMP cleanroom classifications?

ISO classifications are based on particle concentration and are used internationally. EU GMP classifications use Grades A to D and are applied in pharmaceutical production in Europe. The systems are closely related, with ISO 5 corresponding to Grade A.

Why is cleanroom compliance important?

Cleanroom compliance helps reduce contamination risk, ensures product quality and patient safety, and is required to meet regulatory standards from authorities such as the FDA and EU.

What cleanroom class is required for pharmaceutical production?

The required cleanroom class depends on the process. Critical operations such as sterile filling typically require ISO 5 or EU GMP Grade A, while supporting areas may use ISO 7 to 8 or Grades B to D.

Cleanroom classifications – FDA, GMP and ISO

Our products are designed to meet the requirements used in both European and US-regulated environments.

Cleanroom classifications – FDA, EU GMP and ISO 14644

Cleanroom classifications define how clean the air must be in controlled environments used in pharma and life science production.

They set limits for how many airborne particles are allowed per cubic meter of air. The fewer particles, the lower the risk of contamination and the higher the level of control in the environment.

These standards are critical because even small amounts of contamination can impact product quality, patient safety and regulatory compliance.

You will typically come across three main classification systems:

ISO, which is the international standard
EU GMP, used across Europe
FDA, used in the US and based on ISO classifications

Although they use different naming systems, they are closely related and often used together in global operations.

There are more classification standards to respect and you can find a comparison below.

FDA

The FDA uses ISO classes, typically from ISO 5 to ISO 8.

ISO 7 and ISO 8 are used for surrounding areas and support rooms

ISO 5 is used for critical processes like sterile filling

EU GMP

In Europe, cleanrooms are classified from Grade A to D.

Grade A is the most critical zone, where sterile work takes place
Grade B is the background environment for Grade A
Grades C and D are used for less critical steps

These grades are defined in EU GMP Annex 1.

ISO 14644:1

ISO 14644-1 is the international standard that defines cleanroom classes based on particle concentration.

Both FDA and EU GMP classifications are based on this standard, which makes it the common reference point.

How the classifications relate

Even though the systems use different names, they are closely linked:

ISO 5 ≈ Grade A
ISO 6–7 ≈ Grade B
ISO 7–8 ≈ Grade C–D

This is useful to know if you work across different regions or need to align documentation.

Why compliance matters

Cleanroom compliance is not just about meeting requirements. It directly affects your process and product.

It helps you:

reduce contamination risk
pass audits and inspections
document your processes correctly
ensure consistent production quality

Blue Line products are designed with this in mind.

Smooth surfaces, sloped designs and rounded edges make cleaning easier and more reliable. The materials are compatible with commonly used cleaning agents such as isopropyl alcohol, VHP, Spor-Klenz™, Klercide, Actisan, LpH® and Vesphene®.

Documentation from Blue Line

When working in regulated environments, documentation is just as important as the product itself.

Blue Line’s cleanroom products withstand all known cleaning detergents as isopropyl alcohol, non-deionized water, VHP, Spor-Klenz™, Klercide, Actisan, LpH®, Vesphene® and many more.

Our products for life science industries are consciously designed with smooth surfaces, slanted sides and rounded edges meaning that products are easy to clean.

We provide the following compliance documents to support your work:

Compliance Statement: Blue Line Pharmaceutical Hardware Solutions

Pharmaceutical Material Compliance Statement from Blue Line