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ISOBUTYLQUINOLINE ISOMERS.

Questionable CAS 1333-58-0 / PERFUMING

Isobutylquinoline isomers are primarily utilized as fragrance compounds, imparting complex leathery, earthy, mossy, and woody notes to various products. They are not known to offer any direct benefits to skin health or appearance.

perfuming

Science

These compounds function exclusively as scent components, contributing specific aromatic profiles to cosmetic formulations. There is no identified mechanism through which they provide direct therapeutic or beneficial effects on the skin.


Research

Low confidence
Effective range N/A
Optimal

N/A


Transparency

Not commonly dusted

As a fragrance ingredient without direct skin benefits, Isobutylquinoline isomers are not typically associated with 'dusting,' a term generally applied to active ingredients whose concentrations might be deceptively low.


The Formula

Solubility
Oil
Optimal pH 2 – 11
0 7 14

Stability

Isobutylquinoline isomers demonstrate robust odor stability across an extensive pH range of 2 to 11. They are also stable in both alcoholic and oil-based systems, as well as in diverse functional product bases, including lotions, antiperspirants, shampoos, and soaps.


Safety

CIR Status
Not reviewed
Sensitization risk Moderate

Certain isomers, specifically 6-Isobutyl Quinoline, are noted in European data for potential irritation to the eyes, respiratory system, and skin, and may induce skin sensitization in some individuals. While 2-Isobutylquinoline has been assessed as not genotoxic, photoirritating, or photoallergenic, regulatory bodies like IFRA implement restrictions on total usage in fragrance compositions due to the overall sensitization potential of the isomer mixture.


Your Skin

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

Our Assessment

Questionable

As a fragrance ingredient with no identified skin benefits and a moderate risk of irritation or sensitization, Isobutylquinoline isomers are questionable for inclusion in precision skincare formulations.


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