Description

 

Parameter DetailsC13H12N4S
Chemical Name Thymolphthalein
CAS Number 125-20-2
Chemical Formula C28H30O4
Molecular Weight 430.54 g/mol
Appearance White to off-white crystalline powder
Solubility Soluble in alcohol and organic solvents; slightly soluble in water
Melting Point 253–255 °C
Boiling Point Decomposes before boiling

Most Common Uses :

  • Used as a pH indicator in acid-base titrations.
  • Commonly employed in laboratory analysis and chemical research.
  •  Applied in forensic science for detecting blood stains.

pH Transition Range :

  • Colorless to blue transition between pH 9.3 and 10.5

Storage Reccomendation :

  • Store in a tightly sealed container, in a cool, dry, and well-ventilated area. Protect from light and moisture.

Hazards :

  • Harmful if swallowed or inhaled
  • may cause irritation to skin and eyes.
  • Handle with gloves, safety goggles, and in a well-ventilated area.

Other Information :

  • Frequently used as an alternative to phenolphthalein in pH determination.
  •  Used in specialized inks and detection solutions.