Salt of 6-carboxy-3-methylbenzothiazolone hydrazone hydrate in colorimetric determination of hydrogen peroxide
Water soluble salts of hydrazone compounds react quickly with aniline compounds in the presence of a peroxidase and hydrogen peroxide to provide a color which can be measured spectrophotometrically or visually, either in solution or when incorporated in a device for the measurement of analytes of interest. These water-soluble hydrazone salts are useful in determining hydrogen peroxide or an analyte which reacts to produce hydrogen peroxide in an aqueous liquid, by, in the presence of a substance having peroxidative activity, physically contacting a sample of a liquid with a dye-forming composition comprising a water-soluble salt of a hydrazone compound and a substituted or unsubstituted aniline compound to produce a colored dye; and detecting the dye formed as a result of the presence of hydrogen peroxide or an analyte which reacts to produce hydrogen peroxide.
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(2008/06/13)
Chromogenic substrate to peroxidase enzymes
A novel chromogenic substrate to peroxidase enzymes is provided which is comprised of a mixture of an adduct formed from a hydrozone and a dienophile, and an aromatic nucleophile. The mixture undergos an oxidative coupling in the presence of peroxidase enzymes and peroxides forming a purple indamine dye. The mixture is also stable and unaffected by oxygen of the air or by hydrogen peroxide.
This invention relates to copolymerizable ultraviolet light absorber compounds having the formula: STR1 where R is alkyl C1 -C6 ; and Y is a copolymerizable radical selected from acryloyl C3 -C12, acryloxyalkyl C3 -C12, acryloxyhydroxyalkyl C3 -C12, and alkylacryloxyhydroxyalkyl C3 -C12.
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(2008/06/13)
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