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
not classified as polymer; residual butadiene (carcinogen 1A) and hexane controlled
not regulated
Butadiene and solvent fire and explosion risk at plants; pyrophoric aluminium alkyl catalysts.
Main rules
Where
Rule
Effect
EU
Tyre Labelling Regulation (EU) 2020/740; Euro 7 tyre abrasion limits to follow
Favour Nd-BR for low rolling resistance and wear
EU
REACH; IED emission permits
Solvent and butadiene emission controls
US
EPA NESHAP for polymers and resins; OSHA butadiene standard
Plant controls
India
Rule
Effect
Hazardous and Other Wastes Rules: waste tyre EPR (2022)
Tyre recycling obligations
MSIHC Rules 1989 (butadiene)
Hazard controls at Reliance plants
Trade measures
No major BR trade remedy found in sources reached
Supply risk
Moderate. Many producers, but butadiene supply depends on naphtha cracking. Nd-BR depends on Chinese rare-earth supply for its catalyst (rare earths are on EU, US and Indian critical lists).