Arsenazo I Trisodium [520-10-5] is a professionally handled substance with documented safety properties. Its molecular formula is C16H13AsN2O11S2, with a molecular weight of 548.3. This compound belongs to the class of arsenazo dyes, known for their ability to form complexes with metal ions, particularly with copper(II) ions. It carries the hazard signal word 'Danger', indicating potential acute toxicity when ingested. Further confirmed properties include its role as a chromogenic indicator, exhibiting a color change in response to changes in pH levels.

• CAS Number: 520-10-5
• Molecular Weight: 548.3
• Molecular Formula: C16H13AsN2O11S2
• Exact Mass: 547.917671
• GHS Signal Word: Danger
• Hazard Statements:
• H301: Toxic if swallowed [Danger Acute toxicity, oral]