MSDS - Phenolphthalein

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Phenolphthalein material data safety sheet. Reproduced with kind permission of the Department of Chemistry, Oxford University.

Last updated August 12, 2005

Common synonyms
  • 2-(bis-(4-hydroxyphenyl)methyl)benzoic acid
  • C20H14O4
  • Form: Fine white to cream-coloured powder.
  • Stability: Stable.
  • Melting point: 260°C.
  • Water solubility: negligible .
  • Specific gravity: 1.29.
  • Colour change range: pH 8.2 - 10.0
  • Colour change: colourless to pink.
  • pK at 20 C: 9.5
  • Preparation: 0.05g in 100 ml 50% v/v/ ethanol-water.
Principal hazards
  • This chemical may cause irritation if you get it into your eyes or breathe it in.
Safe handling
  • Wear safety glasses.
  • Eye contact: Immediately flush the eye with plenty of water. If irritation persists call for medical help.
  • Skin contact: Wash off with water.
  • If swallowed: Wash out the mouth with water if the person is conscious. If a significant quantity has been swallowed, call for medical help.
  • Small amounts of phenolphthalein can be flushed down a sink with a large quantity of water, unless local rules prohibit this.
Protective equipment
  • Safety glasses.
Further information

More extensive safety data

Bio-rich-time-poor 22:30, 25 June 2011 (BST)