Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1990-07-02
1992-07-14
Lee, Mary C.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
546270, 548181, 548209, C07D27504
Patent
active
051304333
ABSTRACT:
Newly synthesized chromogenic thiol-indicating benzoisothiazolone derivatives having the structure: ##STR1## where R.sup.1, R.sup.2 and R.sup.3 are as defined in the specification, are useful in the detection of thiols, particularly in an aqueous system. This process comprises contacting the aqueous system with a chromogenic thiol-indicating benzoisothiazolone derivative as described herein. Chromophoric changes due to thiol-mediated reduction of the benzothiazolone derivative then occur. Such changes can be in a solution or on an indicator surface in contact or having been in contact with the aqueous system. The chromophoric changes, due to a bathochromic shift in characteristic light absorption upon reduction of the benzoisothiazolone derivative, are proportional to the amount or rate of appearance of thiols in the aqueous system.
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Albarella James P.
Garling David L.
Hatch Robert P.
Coe Roger N.
Lee Mary C.
Miles Inc.
Powers Fiona T.
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