Description

Fluorescent Brightening Agent 166 is a high-performance stilbene-based optical brightener designed to enhance the whiteness and brightness of various substrates. This agent is critical for manufacturers seeking to achieve superior visual appeal and color correction in their finished products. It is primarily utilized by industries involved in the production of synthetic fibers, plastics, detergents, and paper, where optical enhancement is a key quality parameter.

Application

• Primary brightening agent for polyester (PET), polyamide (nylon), and acetate fibers.
• Key additive in the manufacture of engineering plastics and thermoplastic polymers to improve whiteness.
• Formulation component in household and industrial laundry detergents and fabric softeners.
• Used in paper coating and high-quality writing/printing papers to achieve high brightness grades.
• Application in the production of white masterbatches for the plastics industry.
• Potential use in coatings and paints where optical brightening is required.

Basic Information

Product Name	Fluorescent Brightening Agent 166
CAS No.	12224-29-2
Molecular Formula	C₄₀H₄₂N₁₂O₆S₂
Molecular Weight	843.0 g/mol
Synonyms	FBA 166; Optical Brightener 166; 2,2'-(1,2-Ethenediyl)bis[5-[4-[bis(2-hydroxyethyl)amino]-6-(phenylamino)-1,3,5-triazin-2-yl]amino]benzenesulfonic acid; 4,4'-Bis[(4-anilino-6-bis(2-hydroxyethyl)amino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid; Tinopal UNPA-GX; Blankophor ER; Hostalux EBB
EINECS	Contact for details

Quality Control

Our Fluorescent Brightening Agent 166 is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for purity, spectrophotometry for strength, and checks for heavy metals and other impurities. A Certificate of Analysis (COA) detailing all specifications is provided with each shipment to ensure traceability and compliance with your quality requirements.

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 and should be handled accordingly to maintain stability.

Specification

Item	Specification
Appearance	Yellowish-green powder
Identification (IR)	Conforms to standard
Purity (HPLC)	≥ 98.0%
Ash Content	≤ 0.5%
Moisture Content (KF)	≤ 5.0%
pH (1% Aqueous Dispersion)	6.0 - 8.0
Fluorescent Strength	100 ± 3% (vs. Standard)

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