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Compositions of matter useful as pH indicators and related methods

  • US 20050233465A1
  • Filed: 04/14/2005
  • Published: 10/20/2005
  • Est. Priority Date: 04/14/2004
  • Status: Abandoned Application
First Claim
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1. A composition comprising a compound including at least five fused molecular rings, the compound able to be protonated or deprotonated as a result of change in pH of a medium to which the compound is exposed.

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