Description

Fluorescent Brightening Agent 352 is a high-performance stilbene derivative optical brightener designed to impart a brilliant white appearance to materials by absorbing ultraviolet light and re-emitting it as visible blue light. This compound is essential for manufacturers seeking to enhance the perceived brightness and whiteness of their products, overcoming the natural yellowish tint of many substrates. It is a critical additive for industries including paper manufacturing, detergent formulations, textile processing, and polymer production where visual quality is paramount.

Application

• Paper & Pulp Industry: Used as a whitening agent in high-quality writing, printing, and packaging papers to achieve superior brightness.
• Detergent & Soap Manufacturing: Incorporated into laundry detergents and fabric softeners to provide a "whiter-than-white" effect on textiles.
• Textile Finishing: Applied in the finishing process of cotton, nylon, and other synthetic fibers to improve whiteness and brightness.
• Plastics & Polymers: Added to polymers like PVC, polyolefins, and styrenics to correct yellowness and enhance the visual appeal of finished products.
• Cosmetics & Personal Care: Used in formulations where a bright, clean appearance is desired, such as in certain creams and soaps.
• Advanced Coatings: Employed in specialty paints and coatings to improve opacity and brightness.

Basic Information

Product Name	Fluorescent Brightening Agent 352
CAS No.	61902-30-5
Molecular Formula	C₄₀H₄₂N₁₂O₆S₂
Molecular Weight	843.0 g/mol
Synonyms	FBA 352; Optical Brightener 352; 2,2'-(1,2-Ethenediyl)bis[5-[4-[bis(2-hydroxyethyl)amino]-6-(4-sulfophenyl)amino]-1,3,5-triazin-2-yl]amino]benzenesulfonic acid disodium salt; Tinopal CBS-X; Blankophor BBH; 4,4'-Bis[[4-[bis(2-hydroxyethyl)amino]-6-(phenylamino)-1,3,5-triazin-2-yl]amino]stilbene-2,2'-disulfonic acid disodium salt; Stilbene brightener 352
EINECS	263-360-7

Quality Control

Our Fluorescent Brightening Agent 352 is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for assay purity, spectrophotometry for strength and hue, and tests for heavy metals and moisture content, to ensure it meets stringent industry specifications. Certificates of Analysis (COA) documenting all test results are available upon request to support your quality assurance protocols.

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). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to prevent moisture absorption, which can affect performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Light yellow to yellowish-green powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0%
Strength (Spectrophotometry)	100 ± 3%
Moisture Content	≤ 5.0%
Ash Content	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in water)	Clear, yellow solution

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