4,5-dihydroxy-3-((4-methyl-2-sulfophenyl)diazenyl)naphthalene-2,7-disulfonic acid - Names and Identifiers
4,5-dihydroxy-3-((4-methyl-2-sulfophenyl)diazenyl)naphthalene-2,7-disulfonic acid - Introduction
4,5-dihydroxy-3-((4-methyll-2-sulfophenyl) diazenyl)naphthalene-2,7-disulfonic acid is an organic compound with the chemical formula C16H12N2O8S2, abbreviated as 4,5-DNS, also known as phenol red. It is a red crystalline powder, soluble in water and alcohol solvents.
Properties: 4,5-dihydroxy-3-((4-methyl-2-sulfophenyl)diazenyl)naphthalene-2, 7-disulfuronic acid is a colored compound with a brilliant red color. It is a strong acid that reacts with bases to form salts. It is acidic in aqueous solution and has a low pH value.
Use: 4,5-dihydroxy-3-((4-methyl-2-sulfophenyl)diazenyl)naphthalene-2, 7-disulfuronic acid is mainly used as an indicator. It can be used in acid-base titration, coordination chemical reaction and metal ion detection and other chemical experiments. Due to its bright red color, it can also be used as a food colorant.
preparation method: 4,5-dihydroxy-3-((4-methyl-2-sulfophenyl)diazenyl)naphthalene-2,7-disulfonic acid can be synthesized by the reaction of Sultan Ⅳ A and 2,7-naphthalene disulfuric acid. First, Sudan Ⅳ A is reacted with nitrous acid to produce nitroso Sudan Ⅳ A, and then it is reacted with 2,7-naphthalenedisulfuric acid to form the final product 4,5-dihydroxy-3-((4-methyl-2-sulfophenyl)diazenyl)naphthalene-2, 7-diulfonic acid.
Safety information: 4,5-dihydroxy-3-((4-methyll-2-sulfophenyl) diazenyl)naphthalene-2,7-disulfonic acid is generally considered to have low toxicity. However, as a strong acid, it may cause irritation to the eyes, skin and digestive tract. Pay attention to safety measures during use and avoid contact with skin, eyes and mouth. If contact occurs, rinse immediately with plenty of water and seek medical help. In addition, it should be stored in a dry, cool place, away from fire and oxidizing agents.
Last Update:2024-04-09 20:52:54