Question 1

What does Hydrogenated Styrene/Methyl Styrene/Indene Copolymer do in a cosmetic formula?

Accepted Answer

This ingredient is a synthetic film-former and tackifying resin. It helps lip, eye, and stick formats build adhesion, gloss, water resistance, and product payoff.

Question 2

Is Hydrogenated Styrene/Methyl Styrene/Indene Copolymer clean?

Accepted Answer

From a clean-beauty lens, this ingredient draws friction because it is a synthetic petroleum-derived polymer rather than a biologically sourced or readily biodegradable material. It is not primarily known for routine skin irritation, but stricter clean standards often treat persistent synthetic polymers cautiously.

Question 3

Is Hydrogenated Styrene/Methyl Styrene/Indene Copolymer sustainable?

Accepted Answer

This material is typically made from petrochemical feedstocks and is not expected to readily biodegrade. Its environmental profile is driven more by persistence and fossil sourcing than by acute aquatic concerns at cosmetic use levels.

Question 4

Is Hydrogenated Styrene/Methyl Styrene/Indene Copolymer COSMOS-approved?

Accepted Answer

This ingredient is not aligned with COSMOS-natural or COSMOS-organic formulation principles because it is a synthetic petrochemical polymer. It has weak Green Chemistry alignment due to nonrenewable sourcing and limited biodegradability, even though hydrogenation can improve stability and reduce odor or color issues.

Question 5

How does Hydrogenated Styrene/Methyl Styrene/Indene Copolymer work chemically?

Accepted Answer

This material is a saturated, high-molecular-weight hydrocarbon resin made by hydrogenating an aromatic copolymer, which improves color, odor, and oxidative stability compared with the unsaturated precursor. It is oil-soluble, water-insoluble, and used mainly in anhydrous color cosmetics and sticks, often from low single digits to around 10% depending on tack, gloss, and film strength targets.