2-Hydroxy-5-[(E)-2-(4-nitrophenyl)diazen-1-yl]benzoic acid(CAS: 2243-76-7)

2-Hydroxy-5-[(E)-2-(4-nitrophenyl)diazen-1-yl]benzoic acid is a chemical compound with the CAS number 2243-76-7. It is a white or light yellow crystalline solid with a melting point of 217-219°C. This compound is characterized by its hydroxyl and nitrophenyl diazenyl groups.

This compound is primarily used in the pharmaceutical industry as an intermediate for the synthesis of other drugs. It also has applications in the analytical chemistry field for the development of chromogenic reagents and in research for its reactivity with various functional groups.

The compound is generally stable and non-toxic, but it can cause skin irritation. Handling should be done with gloves and protective eyewear. Storage and disposal should follow standard chemical safety protocols to ensure safety and environmental protection.

Store in a cool, dry place away from direct sunlight and heat sources. Keep container tightly closed to prevent moisture absorption. The compound should be stored at room temperature, ideally between 15-25°C, and in a well-ventilated area. Do not store in a damp or humid environment.