Water-Soluble Fragrances of the EGD Series: Application, Dosage & Stability

Many classic fragrance compositions contain components that only mix to a limited extent with water.

In water-based formulations, this can lead to:

• Turbidity
• Floating
• Separation
• Uneven fragrance distribution

The Aroma Nova EGD series has been specially developed for water-based applications to facilitate the integration of a fragrance composition into such systems. The current Aroma Nova product information describes EGD as a fragrance system tailored for this purpose.

What does "water-soluble fragrance" mean?

In a practical product context, this does not necessarily mean that every single fragrance molecule contained is chemically infinitely soluble in pure water.

Rather, the fragrance system is formulated so that the fragrance composition can be better integrated into water-based recipes.

This is an important distinction.

Therefore, the technically more accurate statement is:

"Fragrance system developed for water-based formulations"

instead of the blanket claim:

"Completely soluble with any water at any concentration."

How does the EGD series work?

According to the current Aroma Nova description, the EGD system contains a coordinated combination that facilitates the integration of the fragrance composition into water-containing products. In many formulations, this can eliminate the need for additional external solubilization.

However, this does not mean that any given final formulation will automatically remain:

• crystal clear
• permanently homogeneous
• temperature stable

under all conditions.

The finished product must be tested.

What dosage is possible?

Aroma Nova currently lists the following test ranges for the EGD series:

These values are starting points for product development. The current EGD page lists application concentrations up to 10%.

Important:

"Up to 10% possible" does not mean "10% is optimal or automatically permissible for every product."

Always consider:

• specific EGD fragrance composition
• final recipe
• stability
• area of application
• product-specific safety documentation.

Why start with a low concentration?

More fragrance can:

• alter optical clarity
• affect solubility equilibrium
• change color
• enhance interactions with surfactants or other components.

Therefore, a new formulation should be developed step by step.

For example:

Sample A → 2 %
Sample B → 4 %
Sample C → 6 %

Then compare the results.

The numbers are test concentrations, not a general approval.

Which products are generally suitable?

EGD systems can be interesting for the development of various water-based products, such as:

• water-based room sprays
• cleaning products
• glass cleaners
• textile products
• other water-containing formulations.

Whether a specific EGD fragrance is technically and regulatorily suitable for the respective end product must be evaluated on a product-specific basis.

Can EGD fragrances be used in glass cleaners?

In principle, a fragrance developed for water-based systems can be interesting for the development of a glass cleaner.

However, a statement like:

"EGD guaranteed not to cause streaks"

would be technically too absolute.

Whether the finished glass cleaner:

• remains clear
• works streak-free
• retains its cleaning performance

depends on the entire formulation.

The current Aroma Nova version has therefore been correctly adjusted to state that these properties must be tested on the final product.

What should be checked for stability?

At least:

Simple Stability Test

Day 0

Document:

• Formulation
• Concentration
• pH
• Color
• Odor
• Clarity.

After 24 hours

Check:

• Turbidity
• Separation
• visible deposits.

After 7 days

Compare:

• Odor
• Color
• Homogeneity.

After 30 days

Evaluate:

• Phase stability
• Color development
• Fragrance change.

Long-term test

For commercial products, longer storage and temperature tests are advisable depending on the application.

Why Temperature Tests Are Important

A product may appear perfectly clear at 20 °C and behave differently at:

• low temperatures
• elevated temperatures
• repeated temperature changes

Therefore, stability should not only be assessed immediately after mixing.

What is the difference between EGD and a normal fragrance oil?

A classic fragrance oil is not automatically formulated for direct integration into water-based products.

EGD, on the other hand, was specifically developed for such applications.

However, this does not mean that EGD will automatically work in every arbitrary chemical formulation.

Is an additional solubilizer necessary?

In many suitable EGD formulations, according to Aroma Nova, additional external solubilization can be omitted.

Whether this is actually possible in the specific end product must be confirmed by testing.

IFRA and Safety

Even with water-based products, the product-specific IFRA documentation for the intended use must be taken into account.

IFRA explicitly states that the correct category must be determined based on the actual end use, and for multiple applications, the relevant categories must be compared.

The IFRA Certificate does not replace a complete safety or legal assessment.

FAQ

Are EGD fragrances truly water-soluble?

They are developed for integration into water-based formulations. The final clarity still depends on the complete recipe.

Can I simply mix EGD with water?

For initial trials, this may be possible depending on the product, but for a commercial end product, the complete recipe must be stabilized and tested.

Is 10% always possible?

No. "Up to 10%" is a possible range within the EGD concept, not a universal recommendation.

Do I always need an additional solubilizer?

Not necessarily. One of the purposes of the EGD system is to facilitate integration into water-based systems. However, the specific product must be tested.

Does a clear mixture after 24 hours mean it is stable?

No. Long-term stability testing is still required.

Conclusion

EGD fragrances were developed to facilitate the perfuming of water-based systems.

The professionally correct statement is not:

"EGD is guaranteed clear and stable in every recipe."

But rather:

"EGD was developed for water-based formulations and can facilitate the production of clear and stable systems. The final performance must be confirmed in the specific end recipe."

Professionally reviewed by: Aroma Nova Product Development
Status: August 2026

Technical sources

Aroma Nova – current technical description of the EGD series and test ranges.
International Fragrance Association – application of IFRA Standards and determination of end use.