Formula: C₁₉H₁₅NO₈ IUPAC Name: 3-[Bis(carboxymethyl)amino]methyl]-1,2-dihydroxyanthraquinone CAS: 3952-78-1 EC No.: 223-541-2 M (Molar Mass): 385.33 g/mol Appearance: Orange-red powder

Assay (Spectrophotometric): ≥ 98.0%. Appearance: Orange-red powder. Indicator Performance: Color change from red to blue with calcium ions. Solubility: Soluble in water and ethanol. pH Range: 4.0-6.0 for calcium titration. Sensitivity: Detects 0.01 mM calcium. Loss on Drying: ≤ 0.5%. Residue on Ignition: ≤ 0.1%. Heavy Metals (as Pb): ≤ 10 ppm. Stability: Stable in solution for 1 month. Indicator Solution: 0.1% in water with 0.1N NaOH.