Fluorescent brightener 71
[CAS# 16090-02-1]

Identification

• Classification: Catalysts and additives >> Fluorescent whitening agent
• Name: Fluorescent brightener 71
• Synonyms: Fluorescent brightener 260; Disodium 4,4'-bis[(4-anilino-6-morpholino-1,3,5-triazin-2-yl)amino]stilbene-2,2'-disulphonate
• Molecular Formula: C₄₀H₃₈N₁₂Na₂O₈S₂
• Molecular Weight: 924.91
• CAS Registry Number: 16090-02-1
• EC Number: 240-245-2
• SMILES: C1COCCN1C2=NC(=NC(=N2)NC3=CC(=C(C=C3)/C=C/C4=C(C=C(C=C4)NC5=NC(=NC(=N5)NC6=CC=CC=C6)N7CCOCC7)S(=O)(=O)[O-])S(=O)(=O)[O-])NC8=CC=CC=C8.[Na+].[Na+]

Safety Data

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

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Chronic hazardous to the aquatic environment	Aquatic Chronic	3	H412
Chronic hazardous to the aquatic environment	Aquatic Chronic	1	H410

Discovery and Applications

Fluorescent Brightener 71, also known as a specific type of optical brightener or fluorescent whitening agent, is a chemical compound widely utilized for its ability to enhance the appearance of materials by increasing their brightness and whiteness. The discovery of this compound stems from the need for materials that can maintain their aesthetic appeal by improving their color properties, especially under various lighting conditions.

The development of Fluorescent Brightener 71 was driven by advancements in the field of fluorescence and organic chemistry. This compound belongs to a class of chemicals known as stilbene-based fluorescent brighteners. Its chemical structure includes functional groups that can absorb ultraviolet light and re-emit it as visible light, a property that significantly enhances the brightness of materials. The underlying mechanism involves the absorption of UV light, which is then re-emitted as blue light, creating an effect of increased whiteness.

In practical applications, Fluorescent Brightener 71 is extensively used in the textile industry. It is added to fabrics and fibers during the manufacturing process to enhance their brightness and whiteness. This is particularly important for textiles that are intended for use in consumer products where a bright, clean appearance is desired. By incorporating Fluorescent Brightener 71, manufacturers can ensure that fabrics maintain their appealing visual characteristics even after multiple washes.

Another significant application of Fluorescent Brightener 71 is in the paper industry. It is used in paper products to enhance their whiteness and brightness, improving their visual appeal and quality. The compound helps to offset any yellowing that might occur over time, thereby preserving the aesthetic qualities of paper products used in printing and packaging.

Fluorescent Brightener 71 is also employed in the detergent industry. It is added to laundry detergents to improve the brightness of white and colored fabrics. The compound helps to maintain the original color and brightness of clothing by counteracting the effects of dirt and detergent residues that may cause dullness over time.

Additionally, the compound finds applications in various other industries, including plastics and coatings. In these applications, Fluorescent Brightener 71 is used to enhance the visual properties of plastic products and coatings, ensuring that they meet the desired aesthetic standards.

Research into Fluorescent Brightener 71 continues to explore ways to improve its effectiveness and expand its applications. Innovations in the formulation and application of this compound aim to enhance its performance in maintaining brightness and whiteness across a wide range of materials.

References

1975. Experimental modification of photocarcinogenesis. III. Simulation of exposure to sunlight and fluorescent whitening agents. Food and Cosmetics Toxicology, 13, 47-53.
DOI: 10.1016/s0015-6264(75)80297-5

1997. Fluorescent brighteners: Novel stains for the flow cytometric analysis of microorganisms. Cytometry, 28, 311-319.
DOI: 10.1002/(sici)1097-0320(19970801)28:4<311::aid-cyto6>3.0.co;2-e