1-Naphtholphthalein (pH indicator)

  • CAS :
    596-01-0
  • REF :
    25853
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QUANTITY PRICE ENQUIRY
1 gm Rs 1140.00
5 gm Rs 4460.00

Product Information

  • Formula: C₂₈H₁₈O₄
  • CAS: 596-01-0
  • EC No.: 209-882-1
  • M (Molar Mass): 418.44 g/mol
  • D (Density): ~1.0 g/cm³ (approx.)
  • mp (Melting Point): 252-254 °C
  • bp (Boiling Point): Not applicable
  • pH Range: 7.3 (pink-red) - 8.7 (green-blue)

Chemicals Properties

  • Assay (Colorimetric): Suitable for use as pH indicator.
  • Appearance: White to pinkish powder.
  • Identification (Color Change): Passes test (colorless in acid, pink-red in weak base, green-blue in strong base).
  • Solubility (in Ethanol): Passes test.
  • Loss on Drying: ≤ 0.5 %
  • Sensitivity Test (pH transition): Complies.

Hazard Information

  • Hazard: May be harmful if swallowed.
  • Safety: Avoid dust formation.
  • Storage: Store in a cool, dry place, tightly closed.