Cosmetic roles
Leaves a thin film where appliedFILM FORMING
Safety & regulatory references
Not classified under Korea’s toxic-substance GHS list · existing chemical substance
Reviewed by CIR: Final Report: Safety Assessment of Styrene and Vinyl-type Copolymers as Used in Cosmetics
More data — names, identifiers, properties, test records, literature
Official labels & definitions
JCIA labelling name ポリスチレン: 本品は、スチレンの重合体であり、次の化学式で表される。
Source: JCIA labelling names (Japan)
Names & identifiers
POLYSTYRENEINCI폴리스타이렌Korean label name (MFDS standard)Benzene, ethenyl-, homopolymerSynonymポリスチレンJapanese labelling name
- CAS No.chemical registry number
- 9003-53-6
- DTXSIDUS EPA chemical ID
- DTXSID5031925
- DTXCIDUS EPA compound ID
- DTXCID101521155
- Molecular formula
- (C8H8)n
Measured properties
- Appearance
- solid
- Colour
- colourless
- Melting/freezing point
- 240 ℃
- Flash point
- 345~360 ℃
- Relative density
- 1.04-1.13
- Auto-ignition temperature
- 427 ℃
- Molecular weight
- 10,000-300,000 ((C8H8)x)
Values measured on the substance itself. The KOSHA data are a reference for writing and reviewing safety data sheets, not a specification for a commercial raw material.
Source: KOSHA safety data sheets (Korea)
What products actually use it for
What the 32 products reported to the US EPA with this ingredient use it for. Products outside cosmetics are included, so the top few rows are its main uses.
- Opacifer7
- Binder6
- Film former4
- Propellants, non-motive (blowing agents)3
- Insulators3
- Plasticizer2
- Filler2
- Monomers1
4 other uses
- Foamant1
- Adhesion/cohesion promoter1
- Flame retardant1
- Thickening agent1
Source: US EPA CompTox dashboard
Related literature
- Upcycling of Expanded Polystyrene Waste into Multifunctional Antibacterial Platforms for Microbial Control. · 2025
- The effects of size and surface functionalization of polystyrene nanoplastics on stratum corneum model membranes: An experimental and computational study. · 2023
- Polystyrene microplastic particles induce endothelial activation · 2021
- Synthesis and adsorption properties of highly monodisperse hollow microporous polystyrene nanospheres · 2014
- Assessment of phototoxicity, skin irritation, and sensitization potential of polystyrene and TiO2 nanoparticles · 2011
Linked databases 17
- Australian Industrial Chemicals Inventory (AICIS)
- ChEBI
- China inventory of existing ingredients (IECIC)
- EU CosIng ingredient list 2
- IARC carcinogen classification
- JCIA labelling names (Japan)
- Korea Cosmetic Association ingredient dictionary
- Korea toxic substances GHS register (NIER)
- KOSHA safety data sheets (Korea)
- MFDS (Korea) cosmetic ingredient register 2
- NIST Chemistry WebBook
- Tlooto literature search 2 3 4 5
- US Cosmetic Ingredient Review (CIR) 2
- US EPA CompTox dashboard 2
- US EPA DSSTox chemical database
- Wikidata
- Wikipedia · Korean · English · Japanese · Chinese