China Caustic Soda Market Update: Higher Operating Rates Limit Upside Despite Lower Inventory

China's liquid caustic soda market showed small regional gains during September 10-17, 2026, as lower inventories and scheduled maintenance supported some local offers. However, operating rates increased and more chlor-alkali units are expected to restart, limiting the potential for a broad price rise. For overseas buyers sourcing solid sodium hydroxide, these liquid-market signals are useful background when reviewing Caustic Soda Flakes and Caustic Soda Pearls from a supplier in China.

Key Takeaways for Buyers

Shandong 32% liquid caustic soda averaged approximately RMB 629 per wet metric ton during the week, up 0.21%. The September 17 regional closing reference was around RMB 632 per wet metric ton, while 50% liquid caustic soda was near RMB 985 per wet metric ton. At the fixed working exchange rate of USD 1 = RMB 6.8, these figures are approximately USD 93 and USD 145 per wet metric ton respectively. They are domestic liquid-product references only and must not be compared directly with export quotations for dry flakes or pearls.

China's sampled caustic soda capacity utilization increased to 78.2%, up 0.4 percentage points. Fixed-sample liquid caustic soda inventory declined 3.05% to approximately 484,700 wet metric tons, but remained 28.14% above the level recorded a year earlier. Supply may increase again as more plants restart.

Market Overview: Regional Differences Continue

Shandong prices moved differently by subregion. Lower merchant volume supported some increases in western Shandong, while southern and southwestern areas faced pressure from competitively priced neighboring supply. Producers generally continued to deliver earlier orders, and new transactions became more selective after local price adjustments.

East China was mostly stable. Some plants adjusted operating rates, while export sellers concentrated on executing existing orders. New export inquiries remained limited, and non-alumina downstream demand did not show a clear improvement. Other regions also presented mixed inventory and operating conditions, keeping the national market from developing a single direction.

Supply, Inventory and Demand Signals

One chlor-alkali unit entered maintenance during the week and two restarted. National capacity utilization is expected to rise toward 79.3% in the following week, with weekly supply also forecast to increase. In Shandong, the operating rate could move closer to 85% if scheduled restarts proceed without additional shutdowns.

Demand from alumina and viscose staple fiber remained relatively stable, while other industrial users purchased mainly for immediate requirements. Pre-holiday replenishment could provide temporary support, but weak new export business and limited non-alumina demand may prevent a sustained increase.

National inventory declined during the week, although regional trends differed. Lower inventory can support near-term producer offers, but the expected recovery in operating rates means overseas distributors should confirm the actual shipment window and saleable volume rather than treating the national stock change as evidence of a general shortage.

What Liquid Caustic Soda Signals Mean for Solid Export Buyers

Liquid caustic soda is mainly a regional domestic product because transport economics differ from solid sodium hydroxide. Its price direction can still indicate changes in chlor-alkali operating rates, producer inventories and overall market sentiment. Export buyers should request a current quotation specifically for solid flakes or pearls instead of converting a liquid wet-ton price into an assumed dry-product price.

Domestic flake caustic soda prices were broadly stable during the week. Market activity may improve with pre-holiday purchasing, but easier transport conditions and stable producer offers could limit the scale of any increase. Pearls should be quoted separately according to specification, manufacturer, packing and loading plan.

Short-Term Outlook

Shandong 32% liquid caustic soda is expected to remain near RMB 630 per wet metric ton in the short term, approximately USD 93 per wet metric ton at USD 1 = RMB 6.8. Supply recovery is the main limiting factor, while pre-holiday replenishment and future maintenance by major producers may provide support. The 50% liquid market may remain softer after existing orders are completed because export demand and domestic buying are both limited.

For solid caustic soda, overseas buyers should monitor producer operating rates, actual dry-product availability, container freight and the timing of holiday-related logistics. Current quotations must be reconfirmed because export packing and shipment costs are not represented by domestic liquid-market references.

Packing and Container Shipment Considerations

A solid caustic soda RFQ should identify flakes or pearls, required NaOH specification, total quantity, bag size, pallet preference, destination port, Incoterm and shipment window. Because sodium hydroxide is hygroscopic and corrosive, packing integrity, moisture protection and applicable handling requirements should be reviewed carefully.

Before confirming an order, request the available COA for specification comparison and the current MSDS for transport and handling review. Importers should also confirm destination-country labeling, dangerous-goods documentation and customs requirements with the supplier and their logistics partners.

Short FAQ

Did China's liquid caustic soda price rise this week?

Shandong weekly averages increased slightly, but regional performance was mixed and some areas recorded lower transaction levels.

Will higher operating rates pressure the market?

Additional plant restarts may increase supply and limit price gains, although maintenance schedules and pre-holiday demand could produce regional differences.

Can buyers use the liquid caustic soda price as a flakes quotation?

No. Liquid prices are wet-ton domestic references. Export flakes and pearls require separate quotations based on dry-product specification, packing, quantity and shipment terms.

Procurement Note

Overseas buyers can review the Caustic Soda Flakes product page and Caustic Soda Pearls product page for product and packing information. Send Jinan ZZ International Trade Co., Ltd. your required form, specification, quantity, packing, destination port and shipment window to request current availability, COA/MSDS information and an RFQ-based quotation.