Fluorescent Brightener 185
[CAS# 2866-43-5]

Identification

• Classification: Catalysts and additives >> Fluorescent whitening agent
• Name: Fluorescent Brightener 185
• Synonyms: 2,2'-(2,5-Thiophenediyl)bis-benzoxazole; 2,5-Bis(2-benzoxazolyl)thiophene; 2,5-Di(benzoxazol-2-yl)thiophene; C.I. 515240; C.I. Fluorescent Brightener 172
• Molecular Formula: C₁₈H₁₀N₂O₂S
• Molecular Weight: 318.35
• CAS Registry Number: 2866-43-5 (12224-41-8)
• EC Number: 220-685-1
• SMILES: C1=CC=C2C(=C1)N=C(O2)C3=CC=C(S3)C4=NC5=CC=CC=C5O4

Properties

• Density: 1.385
• Melting point: 216-220 ºC

Safety Data

• Hazard Symbols: GHS07 Warning
• Hazard Statements: H302-H315-H319-H335
• Precautionary Statements: P261-P280-P301+P312-P302+P352-P305+P351+P338

Discovory and Applicatios

Fluorescent Brightener 185, also known as C.I. Fluorescent Brightener 185 or simply FB 185, is a synthetic dye notable for its application in the field of fluorescence and materials science. This chemical compound belongs to a class of organic molecules called fluorescent brighteners or optical brighteners. These substances are designed to enhance the appearance of materials by converting ultraviolet (UV) light into visible blue light, thereby making them appear brighter and whiter.

The discovery of Fluorescent Brightener 185 dates back to the mid-20th century when researchers were actively developing new fluorescent dyes for various applications. It was identified as part of the broader group of fluorescent brighteners, which are commonly used in detergents, paper, and textiles. FB 185 stands out due to its efficient fluorescent properties and stability, which have led to its widespread use in different industrial applications.

In the textile industry, Fluorescent Brightener 185 is extensively used to enhance the brightness and whiteness of fabrics. It works by absorbing UV light and re-emitting it as visible blue light, which compensates for any yellowish tinge in the fabric and makes it appear whiter. This property is particularly valuable in laundry detergents, where it helps to maintain the brightness of clothing and linens over repeated washes. The brightening effect provided by FB 185 contributes to the aesthetic appeal of textiles and is a significant factor in consumer satisfaction.

In addition to its role in textiles, Fluorescent Brightener 185 is also employed in the paper industry. It is used in paper coatings and fillers to improve the brightness of paper products. By enhancing the whiteness of paper, FB 185 helps to ensure that printed materials appear more vibrant and sharp. This application is crucial in the production of high-quality paper products, including magazines, books, and packaging materials.

The compound also finds applications in various other fields, including plastics and coatings. In these areas, Fluorescent Brightener 185 is used to provide a bright appearance to products and improve their visual appeal. Its ability to absorb UV light and re-emit it as visible light makes it a useful additive in products that require enhanced brightness and clarity.

Research into Fluorescent Brightener 185 continues to explore its potential applications and improve its performance characteristics. Studies are ongoing to optimize its stability, efficiency, and environmental impact. As industries increasingly focus on sustainability and performance, the development of more effective and eco-friendly fluorescent brighteners remains a priority.

In summary, Fluorescent Brightener 185 is a synthetic dye with significant applications in enhancing the brightness and whiteness of textiles, paper, and other materials. Its ability to convert UV light into visible blue light makes it a valuable additive in various industries, contributing to the visual appeal and quality of products.