Deep Dive: Sulfur Soars Past 10,000 Yuan/Ton, Triggering a "Cost Tsunami" for Downstream Optical Brightener OB-1
The 2026 chemical market was never destined to be calm. If the raw material price hikes at the start of the year were merely a gentle breeze, then since June, a full-blown cost tsunami-ignited by the "periodic table"-has made landfall.
According to the latest market data, as of early June 2026, the epicenter of the commodity storm-sulfur-has seen its spot transaction price officially break through the 10,000 yuan/ton mark. Meanwhile, this frenzied rally is accelerating down the industrial chain. Following the outcry from the titanium dioxide and phosphate fertilizer sectors, the fine chemical industry's optical brightener OB-1 has now announced another round of price adjustments.
I. The "Crazy Stone": Why Has Sulfur Surpassed 10,000 Yuan?
Sulfur, this seemingly unassuming chemical cornerstone, has now transformed into a "price assassin." As of June 9, domestic spot prices for solid sulfur had surged to 9,600 yuan/ton, while at mainstream local refinery auctions in Shandong and other regions, transaction prices for solid sulfur have substantially broken through 10,000 yuan/ton.
This price level marks sulfur's complete departure from its "cabbage price" of just over 1,000 yuan/ton in early 2024-an increase of over 600% in just two and a half years, marking the strongest market cycle since 2008.
This surge is not mere market speculation, but is driven by deep-seated supply-side crises:
Geopolitical Conflicts Cut Off Import Arteries
Inventory Depletion and Supply Prioritization
II. The Butterfly Effect: The Logic Behind OB-1's Price Hikes
At the far end of the sulfur price shock transmission chain, the price adjustment for optical brightener OB-1 feels both inevitable and reluctant.
For outsiders, it is difficult to connect a basic raw material like sulfur to a specialty brightener like OB-1. Yet, there exists a clear chemical transmission pathway. The production of OB-1 (Chemical name: Fluorescent Brightener 393, CAS: 1533-45-5) relies on specific benzene-series compounds and high-temperature synthesis processes.
More critically, sulfur-as the "lifeblood of the chemical industry"-its runaway pricing has directly elevated the cost baseline for all related basic chemicals. Entering 2026, key OB-1 intermediates such as phthalic anhydride and ortho-xylene have continued to operate at high cost levels due to upstream pressure. Under this "cost-stacking" effect, OB-1 manufacturers are facing immense loss pressures, making price adjustments the only option to sustain production.
Notably, this marks yet another price adjustment for OB-1 in 2026. Earlier in January, driven by Chinese New Year stocking and early raw material increases, there was already a round of hikes for textile-grade brighteners. However, this June adjustment is far more aggressive, with its fundamental driver having completely shifted from "demand-pull" to "cost-push."
III. Downstream Dilemma: Squeezed Profit Margins
In the brightener industry, OB-1 is primarily used for whitening and brightening polyester fibers, plastics, and other polymer materials. Currently, not only are raw material costs rising, but downstream demand is also in its traditional off-season. This creates a "pincer movement" scenario: raw material costs relentlessly escalate, while downstream textile and plastic product manufacturers face weak orders and show low acceptance of high-priced brighteners. OB-1 producers are caught in an awkward position-"producing means losses, while halting production means losing market share."
IV. Outlook: The High-Price Era May Persist
Facing sulfur above 10,000 yuan and continuously climbing OB-1 prices, the market's biggest question is: When will this end?
Looking at the current situation, there are no clear signs of near-term relief. The core supply-side contradictions-logistics disruptions caused by geopolitical conflicts and persistently low port inventory levels-are unlikely to be fundamentally resolved within June.
Unless production costs collapse, the price center for OB-1 and various fine chemicals will shift upward as a whole. For downstream purchasers, the fantasy of "buying the bottom" is now gone. Ensuring supply chain security and finding long-term, stable partnership relationships have become far more important than mere price bargaining.
This industry news article is brought to you by Jinan Tonex Chemical, a professional manufacturer of optical brighteners.