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Ingredient · INCI reference

Tetramethyl Acetyloctahydronaphthalenes

Tetramethyl acetyloctahydronaphthalenes, widely known as Iso E Super, is a synthetic aroma chemical used in cosmetics as a fragrance ingredient with a soft, woody, ambergris-like odor.

What it is

This ingredient is a mixture of related synthetic isomers with a smooth, woody, slightly musky and ambergris-like scent that is prized for its diffusive, skin-blending quality. It is used in fine fragrance and personal care to add warmth, depth, and a long-lasting woody backdrop. Because of its subtle character it is often used to extend and smooth other fragrance notes.

Safety & warnings

As a fragrance material it can contribute to sensitization or irritation in individuals sensitive to fragrance, though it is generally regarded as relatively mild among aroma chemicals. People who prefer fragrance-free products may wish to note its role purely as a scent ingredient.

Origin & sourcing

A synthetic aroma chemical produced industrially; it does not occur in nature.

Questions everyone asks

What does Iso E Super smell like?

It has a soft, woody, slightly musky and ambergris-like odor that blends smoothly into other fragrance notes.

What is its role in a sunscreen?

It functions only as a fragrance ingredient, adding a warm woody character to the product's scent.

Sources & references

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