Sodium 6,7-dihydroxy-2-naphthalenesulfonate(CAS: 135-53-5)

Sodium 6,7-dihydroxy-2-naphthalenesulfonate is a crystalline compound with a molecular weight of approximately 281.21 g/mol. It has a low solubility in water (0.005 g/100 mL at 20°C) and is moderately soluble in ethanol and methanol. This compound is less reactive but can undergo acidic or basic hydrolysis. It is a colorless to white crystalline powder with a slight sulfuric odor.

Sodium 6,7-dihydroxy-2-naphthalenesulfonate is commonly synthesized by the sulfonation of 6,7-dihydroxy-2-naphthalenol using sulfur trioxide in the presence of an appropriate catalyst, such as sulfuric acid. The reaction typically involves the addition of sulfur trioxide to a solution of the alcohol, followed by neutralization with sodium hydroxide to form the sodium salt. The yield is usually around 80-90%. This process is selective and efficient.

Sodium 6,7-dihydroxy-2-naphthalenesulfonate finds application in the pharmaceutical industry as a precursor for the synthesis of other compounds. It is also used in the polymer industry for the production of naphthols, which are used in the synthesis of dyes and pigments. Additionally, this compound is used in the development of sensors and as a reagent in analytical chemistry.

When handling Sodium 6,7-dihydroxy-2-naphthalenesulfonate, it is essential to wear appropriate personal protective equipment (PPE), including gloves, goggles, and a lab coat. The compound should be handled in a well-ventilated area or a fume hood to minimize exposure. Spills should be carefully cleaned up using appropriate absorbent materials. Emergency eye wash stations and safety showers should be readily available. For further information, refer to the Safety Data Sheet (SDS) for detailed handling and storage instructions.