chemical · input
Chlorinated isocyanurate pool disinfectant; 90% available chlorine; slow-dissolving tablets for residential/commercial pools. Only 3 US domestic producers (BioLab, OxyChem, Clearon). China was dominant import source until 285.63% antidumping + 25% Section 301 tariffs; BioLab Hurricane Laura fire (Aug 2020) destroyed ~1/3 of US capacity for 2+ years.
5
Source countries
4
Companies
1
Goods affected
0
Claims on record
What depends on it
1 essential American goods rely on trichloroisocyanuric acid (trichlor pool tablets) somewhere upstream in their supply chain.
Where it comes from
Share of global supply, by country.
| Country | Share of supply |
|---|---|
| CNChina | 55% |
| USUnited States | 15% |
| INIndia | 8% |
| JPJapan | 5% |
| DEGermany | 4% |
Who makes it
4 companies produce trichloroisocyanuric acid (trichlor pool tablets).
One of only three US domestic trichlor (trichloroisocyanuric acid) producers; subsidiary of SCP Pool Corporation / KIK Consumer Products. Westlake, Louisiana facility produces ~one-third of US trichlor supply; fire from Hurricane Laura (Aug 2020) shut plant for 2+ years (reopened Nov 2022), causing nationwide pool chemical shortage.
One of three US domestic trichlor producers; formerly Clearon Corp., acquired by Solenis (Platinum Equity-backed specialty chemical company) on September 9, 2022, and formally renamed Innovative Water Care, LLC on July 31, 2023. Operates a 42-acre bulk manufacturing site in South Charleston, WV plus a separate tableting/packaging facility. Produces both trichloroisocyanuric acid (trichlor) and dichloroisocyanuric acid (dichlor). One of the original petitioners in the 2004 antidumping case against Chinese trichlor imports. With BioLab's Conyers, GA plant permanently closed (May 2025) and the market effectively down to three plant locations, Clearon/IWC is one of the two non-OxyChem survivors.
Nation's largest merchant marketer of chlorine and caustic soda (subsidiary of Occidental Petroleum). Key sites: La Porte TX (~527,800 MT/yr chlorine), Taft + Convent LA (~1.03M MT/yr combined). $1.1B La Porte expansion/membrane conversion announced 2022, startup 2026. Declared force majeure post-Hurricane Ida (2021) and Texas freeze (2021).
One of China's dominant trichloroisocyanuric acid (TCCA) exporters; located in Juancheng County, Heze City, Shandong — the global center of gravity for TCCA production. One of the two most prominent Chinese companies named in US antidumping administrative reviews (alongside Juancheng Kangtai). China-wide entities face a 285.63% antidumping rate; Heze Huayi has participated in multiple administrative reviews to secure individual company rates. The Juancheng County TCCA cluster also produces dichlor, cyanuric acid, and chlorinated isocyanurate derivatives for export across the Asia-Pacific, Middle East, and Latin America.
