Description

Fluorescent Brightener 135 is a high-performance stilbene derivative optical brightening agent (OBA) designed to enhance the whiteness and brightness of various substrates. Its core value lies in its exceptional ability to absorb ultraviolet light and re-emit it as visible blue light, effectively counteracting yellowing and improving the perceived color and brilliance of finished products. This additive is essential for manufacturers in the plastics, synthetic fibers, coatings, and detergent industries seeking to achieve superior visual quality and market appeal for their goods.

Application

• Plastics & Polymers: Widely used in polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), and polystyrene (PS) to impart a brilliant white appearance to products like films, sheets, and injection-molded articles.
• Synthetic Fibers: A key additive in the spin finish or masterbatch for polyester, nylon, and acrylic fibers to improve the whiteness and brightness of textiles and non-wovens.
• Coatings & Paints: Incorporated into industrial and decorative coatings to enhance the opacity and brightness of white and light-colored finishes.
• Detergent & Soap: Used in laundry detergents and fabric softeners as a whitening agent to make fabrics appear cleaner and brighter after washing.
• Paper & Pulp: Applied in the coating or mass of high-quality papers to achieve a high degree of whiteness.
• Printing Inks: Enhances the visual impact of white inks and light-colored printing applications.

Basic Information

Product Name	Fluorescent Brightener 135
CAS No.	12224-12-3
Molecular Formula	C₄₀H₄₂N₁₂O₆S₂
Molecular Weight	843.0 g/mol
Synonyms	2,2'-(1,2-Ethenediyl)bis[5-[4-[bis(2-hydroxyethyl)amino]-6-(phenylamino)-1,3,5-triazin-2-yl]amino]benzenesulfonic acid; Fluorescent Brightener OB-1; Tinopal OB; Blankophor ER; 4,4'-Bis(2-sulfostyryl)biphenyl derivative (common class reference); Optical Brightener 135; FBA 135; OB-1 Brightener
EINECS	Contact for details

Quality Control

Our Fluorescent Brightener 135 is manufactured under a stringent quality management system. Every batch undergoes comprehensive analytical testing to ensure consistent performance, including purity assay, shade evaluation, and solubility checks. A Certificate of Analysis (COA) detailing all relevant specifications is provided with each shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from heat sources and incompatible materials. Under these conditions, the product maintains its stability and performance characteristics.

Specification

Item	Specification
Appearance	Yellowish-green powder or crystals
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Ash Content	≤ 0.5%
Absorbance (in solution)	Within specified range
Fluorescence Intensity	≥ 95% of reference standard
Solubility	Soluble in common organic solvents

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