ANTIMICROBIAL COLORANTS
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United States of America Patent
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Issued Date -
Aug 28, 2008
app pub date -
Oct 10, 2007
filing date -
Mar 19, 2003
priority date (Note) -
Abandoned
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Abstract
Quaternary ammonium salts were incorporated into anthraquinone dyes via a stable linkage. The structure of the antimicrobial colorants were characterized by Fourier Transform Infrared (FTIR), Nuclear Magnetic Resonance (NMR) and UV-vis spectrometry. The dyes demonstrated excellent antimicrobial ability against both gram-negative and gram-positive bacteria in aqueous solution, as indicated by very low minimum inhibitory concentration (MIC). The colorants showed excellent stability in water under light, continuous heating as well as acidic and alkaline conditions.
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