Description

2,2'-(Naphthalene-1,4-Diyl)Bis[5-(Ethylsulphonyl)Benzoxazole] is a high-performance organic compound belonging to the benzoxazole class of fluorescent whitening agents (FWAs) or optical brighteners. This chemical is engineered to absorb ultraviolet light and re-emit it as visible blue light, thereby enhancing the perceived whiteness and brightness of materials. It is a critical additive for manufacturers in the plastics, synthetic fibers, coatings, and detergent industries seeking to achieve superior product aesthetics and quality.

Application

This specialized optical brightener is utilized across various industrial sectors where visual appeal and material quality are paramount.

• Synthetic Fiber Production: Incorporated into polyester, nylon, and acrylic fibers during polymerization or spinning to impart a brilliant, permanent white effect.
• Plastics and Polymer Manufacturing: Used as an additive in the production of engineering plastics, films, and injection-molded articles to counteract yellowing and improve brightness.
• Detergent and Laundry Care Formulations: Serves as a key ingredient in high-efficiency laundry detergents and fabric softeners to make white fabrics appear cleaner and brighter.
• Paper Coating and Bleaching: Applied in the coating of high-quality papers and boards to achieve a high degree of whiteness, often in combination with blue dyes.
• Advanced Coatings and Inks: Used in specific coating systems and printing inks where optical brightening properties are required for special visual effects.

Basic Information

Product Name	2,2'-(Naphthalene-1,4-Diyl)Bis[5-(Ethylsulphonyl)Benzoxazole]
CAS No.	43115-21-5
Molecular Formula	C30H22N2O6S2
Molecular Weight	570.63 g/mol
Synonyms	1,4-Bis(5-ethylsulfonyl-2-benzoxazolyl)naphthalene; Optical Brightener OB-1; Fluorescent Brightener 393; FWA 393; Benzenesulfonamide, N,N'-(1,4-naphthalenediyl)bis[5-(ethylsulfonyl)-2-benzoxazole]; 2,2'-(1,4-Naphthalenediyl)bis[5-(ethylsulfonyl)benzoxazole]; OB
EINECS	Contact for details

Quality Control

Our production of 2,2'-(Naphthalene-1,4-Diyl)Bis[5-(Ethylsulphonyl)Benzoxazole] adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Each lot undergoes comprehensive analysis, including purity assay, spectral identification, and critical performance tests like fluorescence intensity. A detailed Certificate of Analysis (COA) documenting all test results is provided with every shipment to support your quality assurance processes.

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	Light yellow to yellow crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Ash Content	≤ 0.2%
Fluorescence Intensity	Compared to standard

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