1-Bromo-3-hydroxynaphthalene(CAS: 5498-31-7)

1-Bromo-3-hydroxynaphthalene (CAS: 5498-31-7) is a crystalline solid with a molecular weight of approximately 231.06 g/mol. It has a low solubility in water (less than 1 g/100 mL at 20°C) but is more soluble in organic solvents like ethanol, acetone, and dichloromethane. This compound is relatively stable under neutral conditions but can react with strong bases to form hydroxide salts. It is used as a precursor in organic synthesis and exhibits certain reactivity towards nucleophiles and reducing agents.

1-Bromo-3-hydroxynaphthalene (CAS: 5498-31-7) is typically synthesized by the Brönsted oxidation of 3-hydroxynaphthalene using fuming sulfuric acid in the presence of acetic anhydride. The reaction is carried out under anhydrous conditions to prevent side reactions. The yield is usually around 70-80%, and the product is isolated by recrystallization from ethanol or acetone. This method provides a high degree of selectivity for the bromination of the hydroxyl group.

1-Bromo-3-hydroxynaphthalene (CAS: 5498-31-7) is primarily used in the pharmaceutical industry as a precursor for the synthesis of various naphthylamines and other biologically active compounds. It is also used in the manufacturing of dyes and pigments, and in some cases, in the production of semiconductors and electronic materials due to its unique electronic properties.

When handling 1-Bromo-3-hydroxynaphthalene (CAS: 5498-31-7), it is important to wear appropriate personal protective equipment (PPE) such as gloves, safety goggles, and a lab coat. The compound should be used in a well-ventilated area or under a fume hood to minimize exposure to bromine vapor. Spills should be cleaned up with care using appropriate absorbents, and the area should be thoroughly rinsed with water. Always refer to the Safety Data Sheet (SDS) for specific handling and disposal instructions.