Sodium 4,5-dihydroxynaphthalene-2,7-disulfonate dihydrate(CAS: 5808-22-0)

Sodium 4,5-dihydroxynaphthalene-2,7-disulfonate dihydrate is a white crystalline solid. Its molecular weight is approximately 411.17 g/mol. This compound has low solubility in water and high solubility in dilute acids. It is moderately reactive, especially towards bases and reducing agents. It is used in the preparation of various dyes and pigments, and as a component in analytical reagents.

Sodium 4,5-dihydroxynaphthalene-2,7-disulfonate dihydrate is usually synthesized through the sulfonation of 4,5-dihydroxynaphthalene and subsequent neutralization with sodium hydroxide. Common catalysts include concentrated sulfuric acid or fuming sulfuric acid. The reaction is carried out under controlled temperature and pressure conditions to achieve high yield and selectivity.

Sodium 4,5-dihydroxynaphthalene-2,7-disulfonate dihydrate is widely used in the dye and pigment industry. It is also utilized in the production of analytical reagents and in the development of sensors and semiconductors. Its properties make it suitable for applications requiring specific chromophoric groups and functional groups.

When handling Sodium 4,5-dihydroxynaphthalene-2,7-disulfonate dihydrate, it is important to wear appropriate personal protective equipment (PPE), including gloves, goggles, and a lab coat. Work should be conducted in a well-ventilated area or fume hood. Spills should be cleaned up using appropriate cleaning agents and waste should be disposed of according to local regulations. Always refer to the Safety Data Sheet (SDS) for detailed handling and disposal information.