Fluorescent brightener 85
[CAS# 12224-06-5]

Identification

• Classification: Catalysts and additives >> Fluorescent whitening agent
• Name: Fluorescent brightener 85
• Synonyms: Optical Brightener VBL; Disodium 4,4'-bis[(4-anilino-6-hydroxyethylamino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulphonate
• Molecular Formula: C₃₆H₃₄N₁₂Na₂O₈S₂
• Molecular Weight: 872.84
• CAS Registry Number: 12224-06-5
• EC Number: 602-364-1
• SMILES: C1=CC=C(C=C1)NC2=NC(=NC(=N2)NCCO)NC3=CC(=C(C=C3)/C=C/C4=C(C=C(C=C4)NC5=NC(=NC(=N5)NC6=CC=CC=C6)NCCO)S(=O)(=O)[O-])S(=O)(=O)[O-].[Na+].[Na+]

Safety Data

• Hazard Symbols: GHS07 Warning
• Risk Statements: H302-H315-H319-H335
• Safety Statements: P261-P305+P351+P338

Discovery and Applications

Fluorescent Brightener 85, also known by its chemical designation as a stilbene-based optical brightener, is a compound used to enhance the brightness and whiteness of various materials through fluorescence. Discovered in the latter half of the 20th century, it is part of a class of compounds known as fluorescent whitening agents (FWAs) that are designed to counteract the natural yellowing of materials by absorbing UV light and re-emitting it as visible blue light. This technology has become crucial in industries where visual appearance is critical.

One of the primary applications of Fluorescent Brightener 85 is in the textile industry. It is incorporated into laundry detergents, fabric softeners, and other textile care products to improve the appearance of fabrics. By binding to the fibers, it enhances their brightness and makes them look whiter and cleaner under both natural and artificial light. This property is particularly valued in the maintenance of white and light-colored clothing, which can easily show signs of yellowing over time.

In addition to its use in textiles, Fluorescent Brightener 85 is employed in the paper industry. It is added to paper products during manufacturing to improve their whiteness and brightness. The brightening effect is achieved by offsetting the natural yellowing of paper, making it more suitable for high-quality printing applications such as magazines, brochures, and packaging materials. This results in visually appealing paper products that meet the standards required for commercial and artistic uses.

Fluorescent Brightener 85 also finds application in plastics and coatings. In these industries, it is used to enhance the optical properties of various polymer products, making them appear brighter and more vibrant. This is particularly beneficial for packaging materials and consumer goods where product appearance plays a significant role in consumer choice. Additionally, it is used in some cosmetic formulations to improve the appearance of skin and products by reflecting light and creating a more uniform tone.

Despite its widespread use, there are ongoing studies to evaluate the environmental and health impacts of fluorescent brighteners, including Fluorescent Brightener 85. Efforts are being made to ensure that these compounds are used safely and responsibly, with attention to their potential effects on ecosystems and human health.

References

1986. Eisei Shikenjo Hokoku. Bulletin of the Institute of Hygienic Sciences., (104)(45).
PMID: 3567439

2022. A study on the accuracy of a new fluorescent detection method for vaginal fungi. BMC Women’s Health.
DOI: 10.1186/s12905-022-02151-9