Import Fluorescent Brightener Cbs-X (C.I.351) — Buy in Bulk from Supplier in China

Fluorescent brightener CBS-X (C.I.351) is an optical brightening agent whose chemical name is 2,2'-([1,1'-Biphenyl]-4,4'-diyldi-2,1-ethenediyl)bis-benzenesulfon. The supplier lists UV stability and a high absorption rate, making it suitable for both liquid and powder formulations. It is supplied by Dalian Research And Design Institute Of Chemical Industry, an imported tier supplier based in Dalian, China. The product is described as compatible with a broad selection of substrates.

In the brightener market the compound belongs to the stilbene class, which typically offers purity of 98 % or higher and particle sizes around 20 µm. Standard practice is to package the material in 25 kg fiber drums and store it at 15‑30 °C to preserve performance. The agent absorbs ultraviolet light near 365 nm, converting it to blue emission that offsets yellowing in textiles, paper and detergents. These industry norms explain why manufacturers prefer a stable agent that does not degrade during processing.

Typical buyers include textile mills seeking enhanced fabric whiteness, paper producers aiming for bright print contrast, and detergent formulators requiring long-lasting brightness. The supplier mentions flexible order quantities and shipping options such as FOB or CIF, but exact minimums and lead times should be confirmed directly. Importers should verify the material safety data sheet and any applicable certifications before finalising the contract. Payment terms and incoterms are negotiable on a case‑by‑case basis.

Dalian Research And Design Institute Of Chemical Industry is located at 201 Huangpu Road, Shahekou District, Dalian 116023, China. The platform classifies the company as an imported tier supplier with a harbour-level trust tier, indicating that it has undergone basic verification. The public response metrics show a response rate of 0.00 % and an average response time of 0 hours, suggesting that communication may require proactive outreach.

The institute focuses on research and development of chemical additives, including optical brighteners, and offers bulk quantities to international buyers. No additional certifications, production capacity or client references are provided in the listing, so buyers should request the relevant documentation directly from the supplier.