North American sulfur desks on 19 October faced a split Chinese tape: a Shengyishe national 基准价 at 6,652.33 yuan per tonne in the morning wire and a Tonghuashun iFind spot print at 6,076.75 yuan per tonne in the afternoon relay.
The iFind table showed spot down 575.58 yuan day on day, an 8.65 percent move, with a cumulative 1,242.25 yuan loss over the prior week and 1,592.25 yuan over the prior month in the same release.
Shengyishe's 19 October statistics block compared the 6,652.33 yuan 基准价 with 7,685.67 yuan at month start, a 13.45 percent decline in the house benchmark series.
Shandong Dongming Petrochemical's same-day plant cut took liquid sulfur to 5,000 yuan per tonne and solid sulfur to 6,500 yuan per tonne on the PriceSeek wire, deepening the regional offer stack below the national 基准 line.
Open Pacific export anchors from 15 October still frame the Alberta to China corridor. ChemPriceHub's international sulfur roundup cited Vancouver FOB transactions at 830 to 840 dollars per tonne, down 50 dollars on the week.
ChemPortal's freight table on that date listed Vancouver to China on 50 to 60 thousand tonne parcels at 38 to 43 dollars per tonne, unchanged in the published low to high band.
Implied seaborne cost from those open markers lands near 868 to 883 dollars per tonne before conversion and quality adjustments, a desk-level check against domestic yuan replacement rather than a contract print.
Middle East supply into Asia remains priced off October producer contracts quoted openly at 820 to 890 dollars per tonne FOB, with QatarEnergy at 835 dollars in the SMM October notice.
Alberta block stocks measured through AER ST3 at 11.04 million tonnes in August give exporters inventory to work with when Chinese spot weakens, provided rail and terminal slots stay available.
The Vancouver Fraser Port Authority's verified_public series shows 3.51 million tonnes of sulfur exports in 2025, up 5 percent year on year, evidence the stem cleared strongly when buyers were active.
SunSirs sulfuric acid at 1,557.50 yuan per tonne through 18 October had paused for four sessions, suggesting downstream chains were digesting the mid-October sulfur break before Monday's plant cuts.
Desk read: pair the 6,076.75 yuan iFind spot with 830 to 840 dollar Vancouver FOB and 38 to 43 dollar freight when testing whether Alberta tonnes need to chase lower; cite licensed FOB assessments through your data vendor for contract settlement.