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Integrated chemical indicator device

  • US 8,858,887 B2
  • Filed: 07/19/2007
  • Issued: 10/14/2014
  • Est. Priority Date: 07/19/2007
  • Status: Active Grant
First Claim
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1. A chemical indicator device for monitoring the effectiveness of a sterilization process that uses an oxidizing agent as a sterilant and for semi-quantitatively assessing exposure to the oxidizing agent, consisting of:

  • a. a substrate; and

    b. a chemical indicator composition uniformly disposed upon the substrate, consisting of a single dye, pararosaniline base, which when reacted directly with the oxidizing agent sterilant, achieves a range of different, distinct color changes over time in response to direct exposure to different doses of the oxidizing agent sterilant during a single sterilization cycle,wherein the colors achieved by the pararosaniline base are compared to a pre-calibrated, visual color chart so that a semi-quantitative assessment of the dose of the oxidizing agent sterilant to which the device was exposed during the sterilization cycle can he made.

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