Material Insights · Understanding the Material World

Autocatalysts: Regulation

How Euro 7, China 6b and BS-VI set catalyst size

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

ClassificationUN numberKey risks
fresh catalyst: not classified for most grades; PGM salts used in coating are sensitisers (platinum salts: respiratory sensitiser)not regulatedPlatinum salt sensitisation in coating plants; catalytic converter theft.

Main rules

WhereRuleEffect
EUEuro 7, Regulation (EU) 2024/1257tighter durability and new particle limits from 2026-2027 for new types
ChinaChina 6b (from July 2023)high loadings and GPFs
USEPA Tier 3 and 2027 heavy-duty NOx ruletruck catalyst content up
EUEnd-of-Life Vehicles Directiveconverter recovery

India

RuleEffect
Bharat Stage VI (April 2020) and BS-VI stage 2 RDE (April 2023)catalysts and filters on all new vehicles, including two-wheelers
Vehicle Scrapping Policy and Registered Vehicle Scrapping Facility Rules 2021formal channel for converter recovery

Trade measures

  • US antidumping duty of 133% on Russian palladium (2025); US imports from Russia stopped Aug 2025 (palladium tile)

Supply risk

PGM supply is concentrated in South Africa and Russia; all three PGMs are on EU and US critical lists. Demand risk is larger than supply risk as electric cars spread.