Description

Fluorescent Brightener Er-Iii 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 products under UV or daylight illumination. It is primarily utilized by industries involved in polymer processing, detergent formulation, paper production, and textile finishing where optical enhancement is a key quality parameter.

Application

• Synthetic Fiber Whitening: Effective brightener for polyester, nylon, and acetate fibers during melt spinning or finishing processes.
• Detergent and Laundry Care: Key ingredient in premium laundry detergents, fabric softeners, and soaps to impart a "whiter-than-white" effect on textiles.
• Paper and Pulp Industry: Used in coating formulations and mass coloration of high-quality writing, printing, and packaging papers.
• Plastics and Polymer Masterbatch: Incorporated into thermoplastics like PVC, PS, and PE for applications in films, sheets, and injection-molded articles.
• Textile Auxiliary Formulations: Employed in finishing baths and printing pastes for cotton and blended fabrics.
• Advanced Coatings: Enhances the brightness of paints, varnishes, and other surface coatings.

Basic Information

Product Name	Fluorescent Brightener Er-Iii
CAS No.	79026-03-2
Molecular Formula	C₄₀H₄₂N₁₂O₆S₂
Molecular Weight	843.0 g/mol
Synonyms	4,4'-Bis[(4-anilino-6-morpholino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulfonic acid; Fluorescent Brightener ER-III; Tinopal ER-III; Blankophor ER; OBA ER-III; Stilbene Brightener ER; 2,2'-(1,2-Ethenediyl)bis[5-[[4-[(4-anilino-6-morpholino-1,3,5-triazin-2-yl)amino]phenyl]sulfonyl]benzenesulfonic acid]; CI Fluorescent Brightener 220
EINECS	Contact for details

Quality Control

Our Fluorescent Brightener Er-Iii is manufactured under a stringent quality management system. Every batch is tested to ensure it meets precise specifications for purity, strength, and performance characteristics such as hue and fluorescence intensity. A comprehensive Certificate of Analysis (COA) detailing results for assay, identification, and impurity profiles is provided with each shipment to guarantee consistent quality and traceability.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after initial use to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Yellowish-green powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0%
Moisture Content (KF)	≤ 2.0%
Ash Content	≤ 0.5%
Fluorescence Intensity	≥ 95% of reference standard
Solubility (in water)	Clear, yellow-green solution

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