68475-50-3 - Names and Identifiers
68475-50-3 - Physico-chemical Properties
68475-50-3 - Introduction
tris[5-amino-4-hydroxy-3-(phenylazo)naphthalene-2, 7-diulphonato (2-)]dialuminium, also known as naphthalene Orange, is an organic dye. The following is an introduction to some of its properties, uses, methods and safety information:
Nature:
-Appearance: Red to orange crystalline powder.
-Stability: Stable under acidic conditions, but easy to decompose under alkaline conditions.
-Solubility: Low solubility in water, but high solubility in organic solvents.
- pH range: red in the range of pH 3-7, and the color turns yellow when pH>7.
Use:
-Dye: Naphthalene orange can be used as textile, leather, paper and other dyes, because of its bright orange red.
-Indicator: Due to its acid-base discoloration properties, it is often used as an acid-base indicator in chemical laboratories.
-Biochemical experiments: Naphthalene Orange can also be used to analyze metal ions in biochemical experiments.
Preparation Method:
The preparation of naphthalene orange can be obtained by reacting aniline with 2-naphthalenesulfonic acid, followed by oxidation, coupling and sulfonation.
Safety Information:
-Naphthalene Orange is less toxic, but care should be taken to avoid inhalation, ingestion or contact with eyes, skin and mucous membranes.
-Personal protective equipment such as protective gloves, masks and goggles should be worn during operation.
-If you come into contact with skin, rinse immediately with plenty of water.
-Store away from fire and organic matter to avoid reaction with other chemicals.
Last Update：2024-04-09 21:04:16