# Hantok Chemicals breaks ground on TMAH plant in Pyeongtaek

Hantok Chemicals, an affiliate of LOTTE Chemical Group, broke ground on a new TMAH production plant in Pyeongtaek, South Korea, with a KRW 130 billion investment to expand semiconductor-grade TMAH production capacity.

- Type: New facility
- Announced: 2026-06-19
- Where: Pyeongtaek, Gyeonggi Province, South Korea
- Value: $100.0M (130.0B KRW)
- Starts operating: Sep 2027
- Status: under construction
- Products: tetramethylammonium hydroxide (TMAH)
- Sectors: [Semiconductors and Industrial Electronics](https://endata.com/sectors/semiconductors-electronics.md)

## Companies

- [Hantok Chemicals](https://endata.com/companies/92539.md)
- [Lotte Chemical](https://endata.com/companies/2025.md) (investor)
- [Lotte Chemical](https://endata.com/companies/2025.md) (partner)
- [Tokuyama Corporation](https://endata.com/companies/33403.md) (partner)

## Sources

- [tokuyama.co.jp](https://www.tokuyama.co.jp/eng/news/2026/2026061901.html), 2026-06-19: "Hantok aims to increase its current TMAH production capacity by 50% in the future."
- [lottechem.com](https://www.lottechem.com/en/media/news/1210/view.do?page=1), 2026-06-19: "The groundbreaking of the Pyeongtaek plant represents a strategic investment that proactively addresses future market demand and serves as an important milestone in strengthening LOTTE Group's advanced materials business."

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Data from Endata (https://endata.com/). Announcements are summarized from public sources and may be incomplete; check the linked originals.