Product performance and production principle of 2-amino-5-naphthol-7-sulfonic acid

Amino-5-naphthol-7-sulfonic acid (2-amino-5-naphthol -7-sulfonic acid) , also known as J acid, 6-amino-1-naphthol-3-sulfonic acid, C of the formula ₁₀ H ₉ NO ₄ S, molecular weight is 239.

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White or light gray prismatic crystals; slightly soluble in cold water, soluble in hot water, almost insoluble in ethanol , soluble in alkaline solutions such as soda ash, caustic soda, etc.

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After 2-aminonaphthalenesulfonic acid is sulfonated with fuming sulfuric acid, a sulfonic acid group is hydrolyzed in dilute acid, and then alkali fusion is used to obtain sodium phenate, and finally the product is obtained by acidification, suction filtration, washing and drying

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Carbonization reaction gold, hydrolysis pot, filter press, storage tank, salt-forming pot, leaf filter, alkali melting kettle, acid precipitation tank, drying box

Related links: Production process and product use of 1-amino-2-naphthol-4-sulfonic acid