Shengyishe published its September 9 sulfur benchmark at 8,126.75 yuan per tonne on Wednesday morning, a 75.00 yuan or 0.91 percent decline from the September 8 print of 8,201.75 yuan.
The national index is down 2.66 percent from the September 1 month-start level of 8,349 yuan, extending the corrective path that began after the early-September bounce peaked at 8,639 yuan on September 7.
Tuesday's 5.06 percent one-day drop from 8,639 to 8,201.75 yuan was the largest session move in the early-September window. Wednesday's smaller decline suggests the correction is continuing but at a slower daily pace.
Shengyishe's trailing-year statistics put the September 9 print in the mid-high band on a one-year horizon, with a minimum of 2,627.67 yuan, a maximum of 11,084.33 yuan, and a median of 6,856 yuan.
The platform's three-year overbought alert remains active, a reminder that the index still sits well above the long-run average even after two weeks of pullback from the June peak above 11,000 yuan.
Domestic refinery auction prices in Shandong and liquid sulfur in southwest China have been drifting lower in open PriceSeek alerts through early September, consistent with the national benchmark direction.
Port granular prices have not fully converged with the index correction. Longzhong's September 4 review described early September firming as a bounce with autumn phosphate fertilizer stocking below expectations.
Middle East seaborne through Hormuz stays impaired in open trade reporting, which keeps Chinese domestic refinery output and port stocks as the primary demand signal for Pacific nomination timing.
SMM's open H1 2026 account described Canada as a swing supplier with annualized export volume near 5.22 million tonnes, so Pacific loadings still correlate with Chinese import appetite even when the national index corrects.
For the Vancouver stem, a national index below 8,200 yuan narrows the Pacific nomination window that opened when FOB quotes lagged domestic moves through August.
Cross-border molten sulfur into the United States remains the other North American outlet. Canada remains the dominant US import source for recovered sulfur per USGS tables.
Tampa molten sulfur settled at a record 705 dollars per long ton in the third quarter, the domestic liquid benchmark that prices some Western acid after Itafos moved Conda off the Vancouver index.
US Gulf solid exports above 1,100 dollars per tonne in open July reporting remain the seaborne ceiling against which Pacific granular competes into fertilizer and industrial destinations.
Desk read: September 9 confirms a slower daily correction after Tuesday's sharp drop. Watch whether port granular prices follow the index lower or whether the sixty-day lower-band reference limits further downside.