Description

C.I.Fluorescent Brightener 151 (9Ci) is a high-performance stilbene-based optical brightening agent (OBA) designed to enhance the whiteness and brightness of various substrates. This compound is critical for manufacturers seeking to achieve superior visual appeal and perceived cleanliness in their finished products. It is primarily utilized by industries involved in the production of detergents, paper, textiles, and plastics where brilliant whiteness is a key quality parameter.

Application

• Laundry Detergents & Fabric Softeners: Incorporated as a key additive to impart a brilliant white and bright appearance to laundered textiles, compensating for natural yellowing.
• Paper & Pulp Industry: Used in coating formulations and mass coloration to achieve high-grade brightness in printing papers, tissues, and board products.
• Textile Finishing: Applied in the finishing baths for synthetic fibers like polyester and nylon, as well as their blends, to enhance whiteness.
• Plastics and Polymers: Employed as a masterbatch additive for engineering plastics, PVC, and synthetic fibers to improve optical properties and market appeal.
• Soaps and Personal Care Cleansers: Added to certain bar soaps and cosmetic formulations to boost visual purity and brightness.

Basic Information

Product Name	C.I.Fluorescent Brightener 151 (9Ci)
CAS No.	12224-16-7
Molecular Formula	C₄₀H₄₂N₁₂O₆S₂
Molecular Weight	843.0 g/mol
Synonyms	Fluorescent Brightener 151; FB 151; Tinopal CBS-X; Blankophor BSU; 2,2'-(1,2-Ethenediyl)bis[5-[4-[bis(2-hydroxyethyl)amino]-6-(phenylamino)-1,3,5-triazin-2-yl]amino]benzenesulfonic acid disodium salt; 4,4'-Bis[(4-anilino-6-bis(2-hydroxyethyl)amino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid disodium salt; 9Ci; C.I. 40620
EINECS	Contact for details

Quality Control

Our production of C.I.Fluorescent Brightener 151 adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Each lot is tested against comprehensive specifications for purity, strength, and application performance. Certificates of Analysis (COA) documenting key parameters are available upon request to support your quality assurance and regulatory needs.

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. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product efficacy.

Specification

Item	Specification
Appearance	Yellowish-green powder or granules
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Moisture Content	≤ 5.0%
Ash Content	≤ 0.5%
pH (1% Solution)	7.0 - 9.0
Whiteness Degree (on standard fabric)	≥ 120 (or as per customer standard)

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