China Soda Ash Market Update: Prices Stay Weak as Inventory Builds

China's soda ash market remained weak and rangebound during the week of June 19-25, 2026. East China light soda ash was quoted at RMB 1,130/mt on June 25, unchanged from June 18, while East China heavy soda ash stayed at RMB 1,250/mt. Using the working exchange-rate basis of USD 1 = RMB 6.8, these domestic references are approximately USD 166/mt for light soda ash and USD 184/mt for heavy soda ash. These prices are domestic market indicators and should be reconfirmed for export quotations.

Key Takeaways for Overseas Sodium Carbonate Buyers

For overseas buyers sourcing Soda Ash Light, the market signal this week was cautious rather than bullish. Supply declined slightly because some plants reduced operating rates, but weak downstream demand and high producer inventory kept price support limited.

Buyers of dense soda ash should also watch glass-sector demand closely. Float glass prices continued to soften, photovoltaic glass demand was steady but not strong, and downstream users generally maintained need-based restocking rather than aggressive procurement.

Market Overview

According to the supplied market data, soda ash prices were mostly stable to weaker across China. East China light soda ash held at RMB 1,130/mt, East China heavy soda ash at RMB 1,250/mt, North China light soda ash at RMB 1,200/mt and North China heavy soda ash at RMB 1,280/mt. Northwest light and heavy soda ash were both around RMB 930/mt.

Related markets showed limited support. Thermal coal 5500 kcal fell slightly from RMB 863/mt to RMB 860/mt, while domestic float glass averaged RMB 1,104/mt, down 0.63% from the previous week. Photovoltaic glass 2.0 mm held at RMB 8.5/square meter. The overall chain therefore remained under pressure from weak end-use demand and cautious raw-material purchasing.

Supply and Operating Rates

China's soda ash output fell to 750,500 mt during the week, down 21,200 mt or 2.75% from the previous week. Light soda ash output was 325,300 mt, down 12,700 mt, and heavy soda ash output was 425,200 mt, down 8,500 mt.

The comprehensive operating rate fell to 78.80%, compared with 81.03% in the previous week. Some producers reduced load or adjusted operations, while most other units remained stable. The source material noted reduced output from Hubei Shuanghuan and minor adjustment at Anhui Hongsifang, with several other units continuing lower-load or shutdown status.

Inventory and Demand

Despite lower production, inventory still increased. Domestic soda ash producer inventory reached 1.7324 million mt as of June 25, up 32,200 mt or 1.89% from the previous Thursday. Light soda ash inventory was 1.0722 million mt, up 28,800 mt, while heavy soda ash inventory was 660,200 mt, up 3,400 mt.

The theoretical supply-demand balance continued to show inventory accumulation. Total supply was 751,000 mt, while total demand was 718,800 mt, leaving a weekly theoretical surplus of 32,200 mt. Downstream purchasing sentiment remained cautious, with buyers mainly replenishing only essential volumes at lower prices.

Downstream Glass Market

Float glass demand provided limited support. During the week, one float glass production line was ignited, while three lines underwent cold repair. Float glass operating rates were around 73.29%, slightly higher week on week, but the next period may see one line enter cold repair, which would reduce soda ash demand.

Photovoltaic glass utilization was 55.43%, slightly lower than the previous week. The market was described as generally flat, with some downstream module producers accelerating procurement, but supply-demand pressure remained. For soda ash buyers, this means the downstream glass sector is not yet strong enough to reverse the weak soda ash trend.

Market Outlook

The next period is expected to remain weak and rangebound. The source outlook placed light soda ash around RMB 1,050-1,100/mt and heavy soda ash around RMB 1,200-1,250/mt. Supply may increase slightly as some units resume, while demand from float glass and photovoltaic glass may remain low.

Key points to watch include thermal coal price movement, the planned maintenance of Lianyungang Soda Ash, potential recovery at Qinghai Salt Lake and Xuzhou Fengcheng, and production-line changes in float glass and photovoltaic glass. For export buyers, the market does not show strong upward pressure, but quotation validity should still be kept short because plant operation, freight and port schedules can change quickly.

RFQ Guidance for Soda Ash Buyers

When requesting a quotation, buyers should specify light or dense grade, sodium carbonate specification, packing such as 25 kg bags, 40 kg bags, jumbo bags or bulk container loading, order quantity, destination port, shipment window, document requirements and target application. Current market references should be checked against live factory offers, inland logistics, export availability and ocean freight before purchase decisions.

FAQ

Did China soda ash prices rise this week?

No. East China light soda ash and heavy soda ash were both unchanged on June 25 compared with June 18, while the broader market remained weak and low-level rangebound.

Why did inventory increase even though production declined?

Production fell, but downstream demand also weakened. Domestic consumption decreased, and cautious glass-sector procurement caused soda ash producer inventory to continue rising.

What is the main risk for buyers next week?

The main risk is continued weak demand from float glass and photovoltaic glass. Buyers should also monitor whether plant restarts add supply and whether planned maintenance limits regional availability.

Should buyers choose soda ash light or soda ash dense?

The choice depends on application and handling requirements. Soda ash light is commonly used where lower bulk density is acceptable, while dense soda ash is often preferred for glass and bulk handling because of its higher density and lower dust tendency. Buyers should confirm the required grade with their technical team before requesting a quotation.

Is this a good time to request a soda ash quotation from China?

The weak and rangebound market gives buyers a useful window to compare offers, but quotations should still be checked live. Buyers should provide grade, specification, packing, quantity, destination port and shipment window so suppliers can confirm current factory price, freight and loading schedule.