Description

C.I. Fluorescent Brightener 99 is a high-performance stilbene-based optical brightening agent (OBA) designed to enhance the whiteness and brightness of various substrates. Its core value lies in its ability to absorb ultraviolet light and re-emit it as visible blue light, effectively counteracting yellowing and creating a visually brighter, cleaner appearance. This product is essential for manufacturers in the textile, paper, detergent, and plastics industries seeking to improve the aesthetic appeal and perceived quality of their finished goods.

Application

• Textile Finishing: Primary application for whitening and brightening cotton, nylon, polyester, and blended fabrics.
• Paper Manufacturing: Used in coating formulations and pulp to achieve high-brightness paper for premium printing, writing, and packaging.
• Detergent & Laundry Care: Incorporated into laundry detergents, fabric softeners, and soaps to impart a "whiter-than-white" effect on washed garments.
• Plastics and Polymers: Effective brightener for thermoplastics like PVC, polyethylene, and polypropylene to improve visual quality.
• Synthetic Fiber Production: Applied during the spinning process of man-made fibers to achieve inherent brightness.
• Coating and Ink Formulations: Used in specific coatings and inks where optical brightening is required.

Basic Information

Product Name	C.I. Fluorescent Brightener 99
CAS No.	61725-19-7
Molecular Formula	C₄₀H₄₂N₁₂O₆S₂
Molecular Weight	843.0 g/mol
Synonyms	Fluorescent Brightener 99; FB 99; Tinopal CBS-X; 4,4'-Bis[(4-anilino-6-morpholino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid; Stilbene Brightener 99; Optical Brightener OB-99; 2,2'-(1,2-Ethenediyl)bis[5-[[4-[bis(2-hydroxyethyl)amino]-6-(4-morpholinyl)-1,3,5-triazin-2-yl]amino]benzenesulfonic acid]; Blankophor CBS-X
EINECS	262-968-7

Quality Control

Our C.I. Fluorescent Brightener 99 is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure consistent performance, including assay (HPLC), shade comparison, and solubility tests. A Certificate of Analysis (COA) detailing purity, strength, and physical properties is provided with each shipment to guarantee it meets your specific application 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. The product is light-sensitive; prolonged exposure to light may affect its performance.

Specification

Item	Specification
Appearance	Yellowish-green powder or granules
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0%
Shade	Standard sample
Solubility in Water	Soluble
Moisture Content	≤ 5.0%
Ash Content	≤ 0.5%

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