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Compositions containing a urea derivative dye for detecting an analyte and methods for using the same

  • US 6,743,597 B1
  • Filed: 06/13/2000
  • Issued: 06/01/2004
  • Est. Priority Date: 06/13/2000
  • Status: Expired due to Term
First Claim
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1. A storage stable composition of matter comprising:

  • a positively charged porous matrix comprising nylon; and

    a urea derivative dye on at least one surface of said matrix, wherein said urea derivative dye is 10-(carboxymethylaminocarbonyl)-3,7-bis(dimethylamino)phenothiazine or a salt thereof;

    wherein said composition is stable for at least about six months at temperatures ranging from at least about −

    80°

    C. to 60°

    C. under humidity ranging from at least about 0% to 20%.

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