How should Disodium {2-[(E)-(1,8-dihydroxy-3,6-disulfo-2-naphthyl)diazenyl]phenyl}arsonate (CAS: 3547-38-4) be stored?

Disodium {2-[(E)-(1,8-dihydroxy-3,6-disulfo-2-naphthyl)diazenyl]phenyl}arsonate (CAS: 3547-38-4) should be stored in a cool, dry place away from direct sunlight and sources of heat. It should be kept in a tightly sealed container to prevent contact with water and air. Maintain a temperature between 15°C and 25°C and store it in a well-ventilated area to ensure proper conditions for long-term stability.