tetrasodium 6-amino-4-hydroxy-3-[[7-sulphonato-4-[(4-sulphonatophenyl)azo]-1-naphthyl]azo]naphthalene-2,7-disulphonate
[CAS# 2118-39-0]

Identification

• Classification: Organic raw materials >> Aryl compounds >> Naphthalenes
• Name: tetrasodium 6-amino-4-hydroxy-3-[[7-sulphonato-4-[(4-sulphonatophenyl)azo]-1-naphthyl]azo]naphthalene-2,7-disulphonate
• Molecular Formula: C₂₆H₁₅N₅Na₄O₁₂S₄
• Molecular Weight: 809.64
• CAS Registry Number: 2118-39-0
• EC Number: 218-326-9
• SMILES: [Na+].[Na+].[Na+].[Na+].[O-]S(=O)(=O)c5ccc(/N=N/c2c1c(cc(S([O-])=O)cc1)c(cc2)N/N=C4/C(=C\c3c(cc(c(c3)S([O-])(=O)=O)N)C4=O)S([O-])(=O)=O)cc5

Discovory and Applicatios

Tetrasodium 6-amino-4-hydroxy-3-[[7-sulphonato-4-[(4-sulphonatophenyl)azo]-1-naphthyl]azo]naphthalene-2,7-disulphonate is a synthetic azo dye commonly used in a variety of industrial applications. This complex compound, often referred to by its shorter trade names, is part of the family of azo dyes, which are characterized by their vivid color properties due to the presence of azo (-N=N-) functional groups. The discovery of such azo dyes dates back to the late 19th century, with advancements in organic chemistry enabling the synthesis of highly stable and brightly colored compounds. Tetrasodium 6-amino-4-hydroxy is a notable example due to its intense coloration and water-soluble nature, making it suitable for a wide range of uses.

One of the primary applications of this compound is in the textile industry. The dye is widely used for coloring fabrics, particularly those made from cotton, wool, and synthetic fibers. Its strong affinity for these materials and excellent color fastness properties make it a preferred choice for fabric dyeing, ensuring the colors remain vibrant even after repeated washing and exposure to light. Additionally, the dye’s solubility in water allows for easy application in large-scale dyeing processes.

The compound also finds extensive use in the paper industry, where it is employed to add color to various types of paper products, including writing paper, packaging, and decorative papers. Its ability to produce uniform, long-lasting hues on paper makes it highly valuable in this sector.

In the food industry, derivatives of similar azo dyes are sometimes used as colorants in food products. However, the use of this particular compound in food is restricted due to regulatory concerns regarding the safety of azo dyes in consumables.

In addition to its industrial applications, tetrasodium 6-amino-4-hydroxy is used in research settings. Its properties as an azo dye make it a useful tool for studying chemical reactions involving azo coupling and interactions between dyes and substrates.