What this tab covers How it is regulated and what could disrupt supply: hazard classification, rules in the EU, US and India, anti-dumping duties and other trade measures, and supply-risk notes.
Hazards
Classification
UN number
Key risks
Flammable liquid cat 3; skin and eye irritant cat 2; reproductive toxicity cat 2 and specific target organ toxicity (hearing) from styrene (indicative)
UN1866
Styrene vapour exposure in open moulding; fire; peroxide handling at fabricators.
Main rules
Where
Rule
Effect
EU
REACH and CLP classification of styrene; occupational exposure limits
Drives closed moulding and low-styrene resins (indicative)
EU
Classification of cobalt carboxylate accelerators as reproductive toxicants (indicative)
Shift to cobalt-free cure systems
US
EPA NESHAP for reinforced plastic composites production
Limits styrene emissions from moulding (indicative)
BIS standards for GRP pipes and tanks (IS 12709 and others, indicative)
Sets resin grade requirements for water infrastructure
QCOs on 14 polymers, polyester inputs and acrylonitrile withdrawn on 12 November 2025; styrene was not on the list (BIS notification via ELP, Nov 2025)
Easier imports of inputs (indicative)
Trade measures
No major duties on UPR found; tariffs on Chinese quartz stone affect Chinese UPR demand (Chyxx)
Supply risk
Many producers and regional supply make UPR low-risk. India's exposure is to imported styrene and propylene glycol and to Gulf shipping. Not on critical lists.