CAS:116-63-2 | 1-Amino-2-naphthol-4-sulfonic Acid

Products Description

1-Amino-2-naphthol-4-sulfonic Acid, also known as 4-Amino-3-hydroxy-1-naphthalenesulfonic acid and 4-Amino-3-hydroxynaphthalene-1-sulfonic acid, has a CAS number of 116 - 63 - 2, a molecular formula of C₁₀H₉NO₄S, and a molecular weight of 239.25.

Regarding its appearance, 1-Amino-2-naphthol-4-sulfonic Acid usually presents as white or gray needle - shaped crystals. Generally, it contains half a molecule of crystallization water and is prone to turning rose - red under light, particularly in a humid environment. In terms of solubility, it is insoluble in cold water, ethanol, ether, and benzene, but soluble in hot water, hot sodium bisulfite solution, and alkaline solution. Its melting point is approximately 295°C, at which point it decomposes.

Basic Info

Preparation method

1-Amino-2-naphthol-4-sulfonic Acid can be synthesized by nitrosation with sodium nitrite and hydrochloric acid to generate nitroso cations, followed by a series of reactions including proton transfer, 1,4-addition, reduction and aromatization. The classic method is to react nitroso-β-naphthol with sodium bisulfite and sulfuric acid.

Uses

1-Amino-2-naphthol-4-sulfonic Acid is mainly used to make azo dyes. For example, it can be used as a raw material to synthesize dyes such as C.I. Mordant Red 7. During the reaction, the amino and hydroxyl groups in its molecules can participate in the coupling reaction and combine with reagents such as diazonium salts to form azo dyes with specific colors and structures.

Company Profile

TIANJIN GNEE BIOTECH CO., LTD. is an enterprise specialising in the research, development, production and sales of phytochemicals and fine chemicals.Our factory was established in 2021 and is located in Henan Province, covering an area of 3,600 square metres. We have a professional, well-equipped and high-quality R&D team with more than 10 years of R&D experience. Our products are widely exported to many countries, such as the United States, Kazakhstan, Canada, Australia, Europe, etc., and we provide customers with fast shipping services. We hope to establish long-term and mutually beneficial cooperation with more friends in the future, and provide the best products and services for our customers.

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