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ISOBUTYLTHIAZOLE.

Questionable CAS 18640-74-9 / PERFUMING

Isobutylthiazole is a synthetic compound primarily employed for its aromatic properties in cosmetic formulations. It imparts a distinct green, tomato-leaf scent, enhancing the sensory experience of products. Its application is limited to fragrance, with no identified direct benefits for skin health.

Fragrance

Science

This ingredient functions exclusively by providing a specific olfactive profile, characterized by a fresh, green, and subtly earthy tomato-leaf aroma. There is no established mechanism by which isobutylthiazole delivers therapeutic or beneficial cosmetic effects to the skin, as it does not interact with dermal biological pathways for skin improvement.


Research

Insufficient-data confidence
Effective range N/A
Optimal

N/A


Transparency

Not commonly dusted

The Formula

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Isobutylthiazole demonstrates moderate stability under typical handling conditions. To maintain its integrity and aromatic profile, it should be protected from exposure to excessive heat, direct solar radiation, and potential ignition sources.


Safety

CIR Status
Not reviewed
Sensitization risk Moderate

The Cosmetic Ingredient Review (CIR) Expert Panel has not evaluated isobutylthiazole for its safety specifically in cosmetic applications. It is recognized by the FDA as a flavoring agent (21 CFR 172.515, FEMA 3134) and is utilized as a fragrance component in cosmetics, where it is subject to general safety regulations.


Your Skin

No Normal
No Dry
No Oily
No Sensitive
Irritancy Moderate
Comedogenicity Unknown

Our Assessment

Questionable

Isobutylthiazole serves solely as a fragrance agent, offering no direct skin benefits and posing a moderate risk of irritation, making its inclusion questionable in targeted skincare formulations focused on skin health.


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