Description

Fluorescent Brightener 71 is a high-performance stilbene-based optical brightening agent (OBA) designed to enhance the whiteness and brightness of various substrates. Its primary value lies in its ability to absorb ultraviolet light and re-emit it as visible blue light, effectively counteracting yellowing and creating a brilliant, clean appearance. This product is essential for manufacturers in the textile, paper, plastics, and detergent industries seeking to improve the aesthetic appeal and perceived quality of their finished goods. Fluorescent Brightener 71 CAS NO 16090-02-1 is known for its excellent affinity and stability under typical application conditions.

Application

• Textile Finishing: Used for whitening and brightening polyester, nylon, acetate fibers, and their blends.
• Paper Manufacturing: Applied in coating formulations and pulp to achieve high-brightness, blue-white paper grades.
• Plastics and Polymers: Incorporated into polymers like PVC, polyolefins, and styrenics to improve optical properties.
• Detergent and Soap Industry: Formulated into laundry detergents and fabric softeners for a "whiter-than-white" effect on fabrics.
• Synthetic Fiber Production: Added during the spinning process of man-made fibers for intrinsic brightening.
• Printing Inks and Coatings: Enhances the brightness and visual impact of specialty inks and clear coatings.

Basic Information

Product Name	Fluorescent Brightener 71
CAS No.	16090-02-1
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; Tinopal UNPA-GX; Blankophor ER; Fluorescent Brightener ER-I; 4,4'-Bis[(4-anilino-6-bis(2-hydroxyethyl)amino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid; FB 71; Optical Brightener 71
EINECS	240-254-8

Quality Control

Our Fluorescent Brightener 71 is manufactured under a strict quality management system. Every batch is tested to ensure consistent performance, including key parameters like spectral purity, strength, and solubility. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing the results against our internal specifications. Our quality commitment ensures you receive a product that meets the demanding requirements of industrial applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from heat sources and incompatible materials. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Yellowish-green powder or granules
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0%
Strength (Visual)	100 ± 3%
Moisture Content	≤ 5.0%
Ash Content	≤ 0.5%
Solubility (in water)	Partially soluble; forms colloidal dispersion
pH (1% dispersion)	7.0 - 9.0

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