China Liquid Caustic Soda Market Update: Shandong 32% Prices Rise as Chlor-Alkali Operating Rates Decline

China's liquid caustic soda market showed regional divergence during June 5-11, 2026. Shandong 32% ion-exchange membrane liquid caustic soda moved higher as local chlor-alkali operating rates declined and inventories fell, while 50% liquid caustic soda and flake caustic soda prices were mostly stable. For overseas buyers, the market requires close attention because caustic soda prices, liquid chlorine weakness and downstream alumina demand are moving in different directions.

Market Overview

Shandong 32% liquid caustic soda averaged RMB 614/mt during the week, about USD 90/mt using the working exchange rate of USD 1 = RMB 6.8, up 1.8% week on week. The daily closing price rose from RMB 602/mt on June 4 to RMB 621/mt on June 11, about USD 89-91/mt, up RMB 19/mt or 3.16%.

Shandong 50% liquid caustic soda stayed at RMB 1,020/mt, about USD 150/mt. Northwest 98% caustic soda flakes remained around RMB 2,370/mt, about USD 349/mt. Buyers comparing liquid caustic soda with Caustic Soda Flakes should consider product form, storage, handling, shipment mode and destination logistics rather than only comparing headline prices.

Supply and Inventory

China's caustic soda sample producers with capacity of 100,000 mt/year and above reported an average operating rate of 79.3%, down 1.0 percentage point from the previous week. During the period, several chlor-alkali units were under shutdown or maintenance, and some producers adjusted operating loads because of weak liquid chlorine economics.

Weekly caustic soda output was about 801,000 tons, down 8,000 tons from the previous period. Sample inventory on a dry-ton basis fell to around 338,000 tons, down 1.7%. For fixed liquid caustic soda producers with capacity of 200,000 mt/year and above, factory inventory was reported at about 494,700 wet tons as of June 11, down 2.04% week on week but still 29.46% higher year on year.

Regional Market Signals

In Shandong, weak liquid chlorine sales reduced chlor-alkali profitability and encouraged some producers, especially in southwestern Shandong, to lower operating loads. Southern Shandong prices moved up earlier, while northern Shandong initially held stable to retain major customers before lifting prices modestly later in the week.

East China was generally stable to weak. Jiangsu supply increased as earlier maintenance units restarted, while downstream buyers mainly purchased for immediate needs. Zhejiang prices slipped under pressure from low-priced external cargoes and weak non-alumina demand. Central China performed better as outside cargo pressure eased and some local supply reduction expectations supported procurement. South China remained weakly stable, with limited concentrated buying.

Downstream and Related Markets

Alumina remained a key downstream factor. Alumina operating rates rose to about 83.0%, up 0.3 percentage points, and the Shandong alumina price increased from RMB 2,675/mt to RMB 2,695/mt, about USD 393-396/mt. Market sentiment was supported by concerns about potential alumina production disruption and bauxite supply tightness, but spot activity remained mostly narrow-range and cautious.

Viscose staple fiber operating rates rose to 88.28%, up 2.20 percentage points, while prices were stable around RMB 14,000/mt, about USD 2,059/mt. Liquid chlorine in Shandong fell sharply from RMB 200/mt to RMB -150/mt, adding pressure to chlor-alkali margins. Shandong chlor-alkali theoretical gross profit fell to around RMB -184/mt, a sharp decline from the previous period.

Buyer Considerations

For international buyers, the recent rise in Shandong 32% liquid caustic soda does not mean all China caustic soda grades are moving higher at the same pace. Buyers should confirm regional origin, NaOH concentration, delivery basis, tank or container requirements, export packing and shipment timing before comparing quotations.

Liquid caustic soda may be suitable for buyers with tank storage and regular industrial consumption, while caustic soda flakes can be more practical for containerized export, smaller lots and longer storage. Current market figures are based on the reported period and should be reconfirmed before any purchase decision.

Short-Term Outlook

The short-term Shandong liquid caustic soda market may still have upward support if liquid chlorine weakness and low chlor-alkali margins lead producers to reduce operating loads. At the same time, national caustic soda output may increase slightly next week as some units restart, so the broader market may remain regionally mixed rather than uniformly bullish.

The main factors to watch are Shandong downstream procurement, chlor-alkali operating rate adjustments, liquid chlorine price movement, alumina operating rates, high-concentration caustic soda flows between regions and export order activity. Buyers should keep quotation validity short and confirm actual cargo availability before placing larger orders.

FAQ

Why did Shandong 32% liquid caustic soda prices rise this week?
Prices rose because local chlor-alkali operating rates declined, liquid caustic soda inventory fell and some producers faced weaker liquid chlorine economics.

Did all China caustic soda prices increase?
No. Shandong 32% liquid caustic soda moved higher, but 50% liquid caustic soda and 98% caustic soda flakes were mostly stable during the reported period.

How did liquid chlorine affect the caustic soda market?
Liquid chlorine prices fell sharply in Shandong, which reduced chlor-alkali profitability and encouraged some producers to adjust operating loads, indirectly supporting liquid caustic soda prices.

What should buyers confirm before ordering caustic soda?
Buyers should confirm product form, NaOH concentration, grade, packing, quantity, destination port, shipment schedule, storage requirements and the latest quotation.