Description

Disodium 4,4'-Bis(4-Phenyl-2H-1,2,3-Triazol-2-Yl)Stilbene-2,2'-Disulphonate is a high-purity, synthetic organic compound belonging to the stilbene-triazole class, widely recognized for its exceptional optical properties. Its primary commercial value lies in its strong fluorescence and ability to act as an optical brightening agent (OBA) or fluorescent whitening agent (FWA) for synthetic polymers and specialty coatings. This product is essential for manufacturers in the plastics, textiles, and advanced materials sectors seeking to enhance the brightness and visual appeal of their products under UV light. We supply this critical additive with a focus on batch-to-batch consistency and reliable global logistics.

Application

• Optical Brightening Agent (OBA) for Polymers: Incorporated into polyamide (nylon), polyester, and polycarbonate resins to improve whiteness and brightness.
• Fluorescent Whitening Agent for Synthetic Fibers: Used in the production of high-visibility textiles, technical fabrics, and carpets.
• Specialty Coatings and Inks: Enhances the optical properties of security inks, premium paints, and decorative coatings where fluorescence is desired.
• Advanced Material Markers: Serves as a fluorescent tracer or tag in research and development of new polymeric materials.
• Detergent and Paper Brighteners (Specialized Grades): Applied in high-performance formulations where specific spectral properties are required.
• Photographic and Imaging Materials: Used in layers where fluorescence can improve image quality or provide specific optical effects.

Basic Information

Product Name	Disodium 4,4'-Bis(4-Phenyl-2H-1,2,3-Triazol-2-Yl)Stilbene-2,2'-Disulphonate
CAS No.	23743-28-4
Molecular Formula	C34H22N6Na2O6S2
Molecular Weight	728.66 g/mol
Synonyms	Disodium 4,4'-bis(4-phenyl-1,2,3-triazol-2-yl)stilbene-2,2'-disulfonate; Fluorescent Brightener 220; Tinopal CBS-X; Stilbene triazole-based brightener; 2,2'-(1,2-Ethenediyl)bis[5-[2-(4-phenyl-1H-1,2,3-triazol-1-yl)ethyl]benzenesulfonic acid] disodium salt; 4,4'-Bis(4-phenyl-2H-1,2,3-triazol-2-yl)-2,2'-stilbenedisulfonic acid disodium salt; Optical Brightener OB-1 (industry-specific alias)
EINECS	Contact for details

Quality Control

Our production of Disodium 4,4'-Bis(4-Phenyl-2H-1,2,3-Triazol-2-Yl)Stilbene-2,2'-Disulphonate adheres to a strict quality management system to ensure product integrity and performance consistency. Every batch is analyzed using advanced techniques including HPLC for purity, UV-Vis spectroscopy for absorbance/fluorescence profile, and loss on drying for moisture content. Certificates of Analysis (COA) documenting all critical parameters are provided and can be tailored to meet specific customer or regulatory requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Light yellow to yellow powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Absorbance Maximum (UV-Vis)	349 - 353 nm
Fluorescence Emission Max	432 - 438 nm
Heavy Metals (as Pb)	≤ 20 ppm
Sulfated Ash	≤ 0.5%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.