4,4'-Diaminostilbene-2,2'-disulfonic acid(CAS: 81-11-8)

4,4'-Diaminostilbene-2,2'-disulfonic acid (CAS: 81-11-8) is an organic compound with the chemical formula C14H12N2O6S2. It is a white crystalline solid, commonly used as a pH indicator and dye. The compound is known for its strong absorption in the visible spectrum and its ability to change color with pH, making it valuable in analytical chemistry applications.

4,4'-Diaminostilbene-2,2'-disulfonic acid (CAS: 81-11-8) is widely used as a pH indicator, particularly in the range of pH 1.2 to 3.0, where it transitions from red to yellow. It also serves as a dye in textile and industrial applications. Additionally, it is utilized in research for its fluorescent properties and in pharmaceuticals as a component in drug development processes.

4,4'-Diaminostilbene-2,2'-disulfonic acid (CAS: 81-11-8) is generally considered safe when handled properly. It has low toxicity and is not classified as a carcinogen. However, it is advisable to take standard safety precautions, such as wearing gloves and goggles, and to avoid inhalation or skin contact. Safety data sheets should be consulted for detailed handling and disposal guidelines.

4,4'-Diaminostilbene-2,2'-disulfonic acid (CAS: 81-11-8) should be stored in a cool, dry, and dark place to maintain its stability. It is typically kept in a sealed container away from moisture and light. Storage at temperatures below 25°C is recommended to prevent degradation, and it should be protected from strong oxidizing agents to ensure long-term quality.