Shifting dynamics and supply-demand mismatches within bulk chemical raw materials directly influence procurement expenditures for manufacturers and the operational stability of modern supply chains. Today, Wuxi High Mountain Hi-tech Development Co., Ltd. delivers a comprehensive assessment of the domestic chlor-alkali and polyvinyl chloride (PVC) industry chain based on the latest front-line fundamentals, covering liquid caustic soda, flake caustic soda, industrial salt, liquid chlorine, hydrochloric acid, calcium carbide, and both major PVC production routes, aimed at providing practical and sharp commercial insights for our global partners.

1. Caustic Soda Sector: Supply Resumptions Induce Localized Weakness While Flake Caustic Soda Consolidates Stably

The domestic caustic soda market today exhibited a divergent pattern characterized by localized pressure on liquid caustic soda and steady horizontal movement in flake caustic soda. The tug-of-war between supply and demand continues to dictate the market core:

• Liquid Caustic Soda (Regional Supply Expansion, Minor Price Slide): As previously sidelined chlor-alkali facilities in major hubs like Shandong wrapped up scheduled maintenance, spot market supply witnessed a tangible expansion. Conversely, procurement from downstream non-alumINA sectors remained modest, causing overall trading momentum to soften. Approaching the end of the month, alkali plants prioritize optimizing inventory allocations and securing next-month order books, leading to subtle downward price adjustments among select manufacturers in core producing regions like Shandong and Hebei (Cangzhou). In Jiangsu, despite ongoing plant overhauls, strong watchful sentiments left transaction activities highly cautious.

• Flake Caustic Soda (Mainstream Manufacturers Hold Firm, Order Signing Stays Moderate): In contrast to the slight loosening in liquid product prices, the flake caustic soda market demonstrated resilient resistance against price cuts. While capacity rollbacks and operational adjustments occurred at facilities in Shandong and Qinghai, most mainstream producers continue to hold adequate pre-sale backlogs. This near-term delivery insulation has reinforced manufacturers' firm pricing stances. Although downstream operation rates showed no major shifts and buyers stuck to prudent purchasing habits, low-priced spot offers contracted, allowing the market to transition smoothly through a horizontal consolidation phase.

2. Basic Feeds & By-Products: Mixed Variables Stir High-Level Pricing Centers

• Liquid Chlorine (Plant Resumptions and Shifting Demand Intersect, Volatile Trading): The domestic liquid chlorine market turned out a mixed performance today, heavily dictated by regional supply-demand nuances. In Shandong (Liaocheng), certain plants successfully resumed normal operations, slightly increasing merchant volumes; however, because these factories faced minimal shipping pressures previously, spot quotes edged up by 50 RMB/ton. Meanwhile, resumptions in Dongying added to regional supply, but an incremental demand recovery in the downstream propylene oxide (PO) sector created cross-current dynamics, keeping prices largely steady. In contrast, producers in Northern Jiangsu lowered their offers by 50 RMB/ton to stimulate inventory turnover amid volatile buying patterns.

• Hydrochloric Acid (Overhauls Conclude, High-Level Pricing Faces Downward Correction): Supply-demand fundamentals in the domestic hydrochloric acid market stabilized today, though high-level quotes are beginning to face correction pressures. With chlor-alkali facilities across Shandong and the Northwest (Shaanxi) returning to service, the previous market expectation of tight supply reversed. Consequently, transaction centers are showing signs of drifting lower, with 31% synthetic acid prices currently hovering between 150–300 RMB/ton. Moving forward, as new production capacities gradually come online in regions like Guangxi, next-month contract negotiations are expected to face sustained pressure.

• Industrial Salt (Sea Salt Prices Edge Up on Weather Disruptions, Flat General Trend): The broader industrial salt market held steady today, with the domestic ex-factory tax-inclusive average price maintaining its position at 240 RMB/ton. Well-and-rock salt operations ran normally; despite a brief, half-month turnaround scheduled at a facility in Chongqing, overall spot availability remained ample and shipments progressed at a moderate pace. For sea salt, recent rainfall disruptions in coastal eastern Shandong hampered brine collection and crystallization, prompting producers to push offers slightly higher even as downstream two-alkali industries restricted intake to rigid-demand baselines.

3. Upstream Feedstock Linkage: Semi-Coke Costs Lift Calcium Carbide Benchmarks

Serving as the direct cost baseline for carbide-based PVC, the calcium carbide market logged an upward shift in its pricing center today. While certain downstream PVC producers scaled back their carbide intake as seasonal maintenance schedules took effect—leading to varied inventory pressures across individual carbide producers—the impact of peak-load power management in major manufacturing hubs like Inner Mongolia has significantly eased. Simultaneously, creeping raw material costs for upstream semi-coke (Lanitan) lifted the absolute cost floor for producers. Today, the ex-factory benchmark for calcium carbide in Wuhai, Ningxia, edged up to around 2500 RMB/ton, dragging delivered terms higher across major consuming nodes as upstream entities leveraged the cost push to strengthen their firm offer postures.

4. Downstream Portfolio: Futures Boom Rallies Carbide PVC While Ethylene Route Consolidates

Driven by the dual momentum of rising calcium carbide inputs and robust macro-capital inflows into the commodities market, the two primary process routes for PVC displayed sharp divergence today:

Carbide-Based PVC: Heavy Short-Covering Rallies Futures, Reviving Spot Confidence

Triggered by massive short-covering and a powerful upward breakout during the trading session, the core PVC futures contract surged aggressively, showing a strong intent to reclaim the psychological 5,000 RMB mark. This strong futures rally successfully reversed the pervasive bearish mood in the spot market, resulting in a hybrid layout of fixed-price and formula-based (basis point) offers. As fixed-price transaction volumes expanded compared to earlier in the week, major production enterprises across Northern, Eastern, and Southern China initiated trial price hikes, leaning toward firm-priced shipments. Although downstream conversion plants remained highly conservative regarding higher-priced spot volumes—limiting actual transaction breakouts—heightened inquiry frequencies successfully anchored the spot price range at 4700–4900 RMB/ton (tax-inclusive self-pickup).

Ethylene-Based PVC: Bottom-Cost Defenses Persist Amid Persistent Demand Sluggishness

In stark contrast to the volatile rally seen in the carbide route, the ethylene-based PVC spot market logged a quiet, flat session today. Although raw material ethylene costs trended on the softer side, absolute values remain historically elevated, preserving a firm cost floor for producers. Currently, even though the domestic ethylene-based PVC industry is operating at low-to-medium capacities (below 50%), sluggish downstream digestion combined with underwhelming export order books has kept industry inventory pools elevated. The underlying structural supply-demand imbalance continues to limit upward mobility, holding mainstream delivered quotes in East and South China within a tight consolidation band of 5200–5700 RMB/ton (tax and freight inclusive).