Description: 
Appearance: red and purple crystalloid powder, with greenish metallic luster.
Solubility: soluble in hot water, soluble in cold water, hardly soluble in ethanol and aether.
Melting point: ＞300℃.
Used: complexation indicator (to titrate ca, cu, mn, cobalt, nickel, zinc.they, etc.). Spectrophotometric determination of calcium.
Storage: This product should be preservation in a sealed dry dark place.