Caustic soda Price 2026: Trend by Country, Producers and Outages

Caustic soda price by country

One row per country: FOB exports for net exporters, CIF imports for net importers, monthly unit values from national customs statistics.

In verification: Saudi Arabia (latest customs month April 2026); Turkey (latest customs month December 2025). Each is added as soon as its customs record has enough recent months to publish a reliable monthly price.

Caustic soda price trend, last four quarters

Caustic soda price history since 2015

Annual average unit values from national customs statistics, 2015 to 2025, for each published country (value over net weight of the year, same basis as the monthly series). It places today's price in the cycle: how far it sits from the long-run low, high and average.

"Above" counts the yearly averages the figure beats.

Caustic soda price outlook by region

What moved the caustic soda price in April 2026?

2 plant event(s) (outages or capacity changes) fell in this period; the events, the plants and the tonnage affected are in the Group and All-access dashboards.

Caustic soda plant maintenance and outages

2 plants are offline now (91,000 t/y of capacity).

Plants, dates and tonnes lost: dashboard.

Who produces caustic soda?

55 plants across 5 region(s) are in the registry, each from a filing or company release. The public page lists the producers; sites, capacities, status, outages and the turnaround calendar are in the Group and All-access dashboards.

• Latin America: Unipar, Braskem (5 plants)
• Europe: INEOS Inovyn, Vynova, Covestro, Nobian, Westlake (18 plants)
• Asia Pacific: AGC, Epigral, Grasim, Reliance, GACL, Chemplast Sanmar, DCM Shriram, GNAL, Tosoh, Kashima Chlorine & Alkali (21 plants)
• Middle East: SAMAPCO, BCI, Petkim (3 plants)
• North America: OxyChem, Formosa USA, Dow, Olin, Shintech, Westlake (8 plants)

Open the plant registry in the dashboard →

How is the caustic soda price assessed?

Trade-implied from customs data (rule v3, 29 Sep 2026). Trade-implied unit value: the customs value of a country's monthly trade in the commodity's HS code divided by the customs tonnage, from national customs statistics as compiled by UN Comtrade, on the world-partner total. Exports FOB are used for net exporters and imports CIF for net importers, so each country line is the leg that carries the volume. The tonnage is the as-shipped weight recorded by customs, so lye and solution products are priced on shipped tonnes, not contained product. A month is published only when its tonnage clears the volume floor and the figure passes the desk's checks against the previous months and the other countries; a month that fails is held, not estimated. A figure marked rev was revised after first publication and the earlier value stays in the record.

A quarter is the mean of its published months. Years before the monthly series are customs annual totals (value over net weight); years under 1,200 t traded are left out. The world figure is the tonnage-weighted mean of the countries sharing the latest month. "rev" marks a revised figure; the earlier value stays in the record. Every number is computed from the customs record and verified by the research desk; nothing is typed in.

Primary source: national customs statistics as compiled in UN Comtrade (monthly, HS 281511, 281512, world partner), classified under the WCO Harmonized System.

Data access

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See the dashboard before you subscribe

A screen share of the caustic soda dashboard with the research desk. Bring your own figures to compare.

Questions buyers ask about the caustic soda price

Cite as: Douglas Insights, Caustic soda price by country, April 2026, https://www.douglasinsights.com/prices/caustic-soda/, accessed 13 November 2026.