# Styrene: Regulation

The leak at Visakhapatnam and other hard lessons

Source page: https://www.materialinsights.org/chemicals/styrene/regulation/

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; acute toxicity cat 4 (inhalation); skin and eye irritation cat 2; reproductive toxicity cat 2; STOT repeated exposure cat 1 (hearing organs) | UN2055 | Self-polymerisation if inhibitor is depleted or temperature rises, releasing heat and vapour. The LG Polymers styrene vapour leak at Visakhapatnam on 7 May 2020 killed 12 people (indicative). |

#### Main rules

| Where | Rule | Effect |
|---|---|---|
| **EU** | REACH registration; Seveso III; EU single-use plastics directive restrictions on EPS food containers | Reduces some PS packaging demand (indicative) |
| **US** | IARC lists styrene as probably carcinogenic (Group 2A, 2018, indicative) | Labelling and exposure scrutiny |

#### India

| Rule | Effect |
|---|---|
| **MSIHC Rules 1989; Plastic Waste Management (Amendment) Rules 2021 ban on many single-use plastics including PS cutlery (from 1 July 2022, indicative)** | Tighter storage controls after the 2020 Vizag leak; lower demand for disposable PS |

#### Trade measures

- China's anti-dumping duties on styrene from the US, South Korea and Taiwan (from 2018, indicative; ICIS reported 50% combined duties on US styrene in 2019).

#### Supply risk

Gulf exports, over 20% of world trade, all pass Hormuz (S&P Global, 2026). India is fully import-dependent. Not on critical lists.

## Other sections

- [Summary](https://www.materialinsights.org/chemicals/styrene/index.md)
- [Overview](https://www.materialinsights.org/chemicals/styrene/overview/index.md)
- [Correlation](https://www.materialinsights.org/chemicals/styrene/correlation/index.md)
- [Production route](https://www.materialinsights.org/chemicals/styrene/routes/index.md)
- [Production](https://www.materialinsights.org/chemicals/styrene/production/index.md)
- [Feedstocks](https://www.materialinsights.org/chemicals/styrene/feedstocks/index.md)
- [Cycles](https://www.materialinsights.org/chemicals/styrene/cycles/index.md)
- [Trading](https://www.materialinsights.org/chemicals/styrene/trading/index.md)
- [Movement](https://www.materialinsights.org/chemicals/styrene/movement/index.md)
- [Characteristics](https://www.materialinsights.org/chemicals/styrene/characteristics/index.md)
- [Emissions](https://www.materialinsights.org/chemicals/styrene/emissions/index.md)
- [Relationships](https://www.materialinsights.org/chemicals/styrene/links/index.md)