Description

Fluorescent Brightener 87 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 visually brighter, cleaner appearance. This product is essential for manufacturers in the plastics, synthetic fibers, coatings, and detergent industries seeking to improve the aesthetic quality and market appeal of their finished products.

Application

• Primary whitening agent for a wide range of thermoplastics, including polypropylene (PP), polyethylene (PE), ABS, and PVC.
• Brightening of synthetic fibers such as polyester, nylon, and polyacrylonitrile during spin finish application or mass pigmentation.
• Formulation of high-performance industrial and household detergents and fabric softeners to impart a "whiter-than-white" look to laundered textiles.
• Enhancement of brightness and opacity in paper and paperboard coatings, especially in high-quality printing and packaging grades.
• Use in coatings, inks, and adhesives to improve the visual perception of whiteness and to mask inherent substrate yellowness.
• Potential application in the manufacture of specialty photographic papers and certain advanced material coatings.

Basic Information

Item	Detail
Product Name	Fluorescent Brightener 87
CAS No.	12768-91-1
Molecular Formula	C40H38N12Na4O16S4
Molecular Weight	1187.1 g/mol
Synonyms	Tinopal CBS-X; Fluorescent Brightener CBS-X; 2,2'-(1,2-Ethenediyl)bis[5-[[4-[bis(2-hydroxyethyl)amino]-6-(phenylamino)-1,3,5-triazin-2-yl]amino]benzenesulfonic acid] tetrasodium salt; 4,4'-Bis[[4-[bis(2-hydroxyethyl)amino]-6-anilino-1,3,5-triazin-2-yl]amino]stilbene-2,2'-disulfonic acid tetrasodium salt; Blankophor CBS-X; FBA 87; Optical Brightener 87; OBA 87
EINECS	Contact for details

Quality Control

Our Fluorescent Brightener 87 is manufactured under a stringent quality management system. Every batch is subjected to comprehensive analytical testing, including HPLC for assay and purity, spectrophotometry for strength and hue, and checks for solubility and physical properties. A Certificate of Analysis (COA) detailing all test results is provided with each shipment to ensure traceability and compliance with your specifications and industry standards.

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). 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 (Spectrophotometry)	100 ± 3% of standard
Moisture Content	≤ 5.0%
Ash Content	≤ 0.5%
Solubility (in water)	Clear, yellow-green solution
pH (1% aqueous solution)	7.0 - 9.0

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