On October 22, affected by the price fluctuation of the raw material (sulfur), the quoted price of food-grade sodium metabisulfite (with a content of 96.5%) in the Hunan market was 3,650 yuan per ton, a decrease of 100 yuan per ton.

On October 22, the market price of phthalic anhydride in East China showed a stable trend. The mainstream quoted price of phthalic anhydride produced by the ortho-phthalic method in the market is 10,000-10,500 yuan per ton, and the quoted price of phthalic anhydride produced by the naphthalene method is 9,400-9,600 yuan per ton. Crude oil prices rose in a volatile manner, which was transmitted to the downstream sector. The price of industrial naphthalene is firm and consolidating, with the quoted price of ortho-phthalic at 10,150 yuan per ton. The price of ortho-phthalic has stabilized, and cost support still exists. The market of downstream plasticizers has stabilized. The operating load of equipment of plasticizer manufacturers has increased, and downstream rigid demand purchases are being made. Phthalic anhydride is mainly purchased on demand, and demand support for phthalic anhydride still exists. The operating load of equipment of phthalic anhydride manufacturers has rebounded, the supply of phthalic anhydride is stable, and the inventory of phthalic anhydride is at a low level. It is expected that the market of phthalic anhydride will stabilize in the future.

On October 22, the phthalic anhydride market in Shandong region showed a stable trend. The mainstream negotiated price of o-xylene-based phthalic anhydride was 10,000-10,100 yuan per ton, and the price of naphthalene-based phthalic anhydride was 9,500-9,600 yuan per ton. Crude oil prices fluctuated and rose, and cost support still existed. The price of raw material o-xylene fluctuated and stabilized, the price of industrial naphthalene consolidated, the cost of phthalic anhydride tended to stabilize, the market of downstream plasticizers stabilized, the operating load of phthalic anhydride manufacturers increased, the supply of phthalic anhydride market was stable, the operating load of plasticizer enterprises rebounded, the rigid demand support for phthalic anhydride weakened, and the phthalic anhydride market stabilized.