Description

Fluorescent Brightener 220 is a high-performance stilbene-based optical brightening agent (OBA) designed to enhance the whiteness and brightness of various substrates. This compound is essential for manufacturers seeking to achieve superior visual appeal and perceived cleanliness in their finished products. It is primarily utilized by the plastics, synthetic fibers, and detergent industries to impart a brilliant, blue-white fluorescence under UV light.

Application

• Plastics and Polymers: Widely used in the whitening and brightening of engineering plastics, PVC, polyolefins, and synthetic fibers to improve aesthetic quality.
• Detergent and Laundry Care: A key additive in laundry detergents and fabric softeners to compensate for fabric yellowing and deliver a "whiter-than-white" appearance on textiles.
• Paper Manufacturing: Employed in high-quality paper production, including copy paper and art paper, to increase brightness and opacity.
• Textile and Fiber Treatment: Applied in the spin-finish or coating of synthetic fibers like polyester and nylon to enhance their brilliance.
• Coatings and Inks: Incorporated into specific coatings and printing inks where optical brightening effects are required.

Basic Information

Product Name	Fluorescent Brightener 220
CAS No.	16470-24-9
Molecular Formula	C₄₀H₃₈N₁₂O₈S₂
Molecular Weight	878.96 g/mol
Synonyms	2,2'-(1,2-Ethenediyl)bis[5-[4-[bis(2-hydroxyethyl)amino]-6-(phenylamino)-1,3,5-triazin-2-yl]amino]benzenesulfonic acid; Tinopal UNPA-GX; Fluorescent Brightener ER-I; Blankophor ER; CBS 220; OB 220; Stilbene Brightener 220; 4,4'-Bis[(4-anilino-6-bis(2-hydroxyethyl)amino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid
EINECS	240-521-7

Quality Control

Our Fluorescent Brightener 220 is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and spectrophotometry for strength and hue, to ensure consistent performance and compliance with industry specifications. A comprehensive Certificate of Analysis (COA) detailing purity, absorbance, and physical properties is provided with each shipment.

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 (store away from light).

Specification

Item	Specification
Appearance	Yellowish-green powder
Identification (IR)	Conforms to standard
Purity (HPLC)	≥ 98.0%
Moisture Content	≤ 2.0%
Ash Content	≤ 0.5%
Absorbance (in DMF)	Meets typical range
Fluorescence Intensity	≥ 100% of reference standard

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