Fluorescent Brightener CBS-X
[CAS# 27344-41-8]

Identification

• Classification: Catalysts and additives >> Fluorescent whitening agent
• Name: Fluorescent Brightener CBS-X
• Synonyms: 2,2'-([1,1'-Biphenyl]-4,4'-diyldi-2,1-ethenediyl)bis-benzenesulfonic acid disodium salt; Brightener BR 49
• Molecular Formula: C₂₈H₂₀Na₂O₆S₂
• Molecular Weight: 562.56
• CAS Registry Number: 27344-41-8
• EC Number: 248-421-0
• SMILES: C1=CC=C(C(=C1)/C=C/C2=CC=C(C=C2)C3=CC=C(C=C3)/C=C/C4=CC=CC=C4S(=O)(=O)[O-])S(=O)(=O)[O-].[Na+].[Na+]

Safety Data

• Hazard Symbols: GHS05;GHS07 Danger
• Risk Statements: H318-H319-H332
• Safety Statements: P261-P264+P265-P271-P280-P304+P340-P305+P351+P338-P305+P354+P338-P317-P337+P317

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Eye irritation	Eye Irrit.	2	H319
Serious eye damage	Eye Dam.	1	H318
Acute toxicity	Acute Tox.	4	H332
Chronic hazardous to the aquatic environment	Aquatic Chronic	3	H412
Chronic hazardous to the aquatic environment	Aquatic Chronic	4	H413

Discovery and Applications

Fluorescent Brightener CBS-X, also known by its chemical name 4,4'-bis(2-sulfobutyl)stilbene-2,2'-disulfonic acid, is a well-known optical brightener used to enhance the brightness and whiteness of various materials. This chemical substance belongs to the class of stilbene-based fluorescent dyes, which are known for their ability to absorb ultraviolet light and re-emit it as visible blue light, thereby improving the perceived whiteness of materials.

The discovery of Fluorescent Brightener CBS-X can be traced back to advancements in fluorescent dye technology in the mid-20th century. Researchers seeking to improve the appearance of textiles, papers, and other consumer products found that adding fluorescent brighteners to these materials could significantly enhance their visual appeal. CBS-X emerged as a prominent compound due to its excellent performance and stability under various conditions.

In terms of applications, Fluorescent Brightener CBS-X is widely utilized in the textile industry to improve the whiteness and brightness of fabrics. When incorporated into detergent formulations or directly applied to textiles during the washing process, CBS-X helps to counteract the natural yellowing that occurs over time. This effect is achieved by absorbing ultraviolet light and emitting it as visible blue light, thus giving fabrics a cleaner and brighter appearance. CBS-X is particularly valued for its effectiveness in maintaining the brightness of white and light-colored fabrics.

The use of CBS-X extends beyond textiles; it is also employed in the paper industry to enhance the whiteness of paper products. When added to paper coatings or included in the paper manufacturing process, CBS-X improves the brightness and visual quality of the final product. This application is crucial for producing high-quality printing papers, where brightness and clarity are essential for optimal print quality.

Additionally, CBS-X finds application in the plastic industry, where it is used to brighten and enhance the visual appeal of plastic products. Its incorporation into plastic formulations ensures that products maintain a high level of whiteness and brightness, which is important for consumer perception and product quality.

The stability of Fluorescent Brightener CBS-X under various conditions, including exposure to light and heat, makes it a reliable choice for these applications. Its ability to perform consistently over time ensures that the treated materials retain their enhanced brightness and whiteness throughout their use.

In summary, Fluorescent Brightener CBS-X is a valuable compound in the fields of textiles, paper, and plastics, where its ability to enhance brightness and whiteness is highly beneficial. Its discovery has had a significant impact on improving the visual quality of consumer products, making it an important component in various industrial processes.

References

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

2014. Determination of Tinopal CBS-X in rice papers and rice noodles using HPLC with fluorescence detection and LC-MS/MS. Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment.
DOI: 10.1080/19440049.2014.934302

2005. Spectroscopic Studies of the Intermolecular Interactions of Congo Red and Tinopal CBS with Modified Cellulose Fibers. Langmuir.
DOI: 10.1021/la046842j