Colorimetric detector for ozone and method of preparation
申请人:Kansas State University Research Foundation
公开号:US04859607A1
公开(公告)日:1989-08-22
3-Methyl-2-benzothiazolinone acetone azine and 2-phenylphenol in 1:4 molar solid mixture reacts specifically with ozone at concentrations of environmental interest to produce a red-violet color. The response is proportional, but not rectilinearly, to ozone concentration at constant exposure time and to time of exposure at constant ozone concentration. The reagent is intended for use with visual comparison standards in passive monitoring devices. No interference was observed from atmospheric oxygen, nitrogen dioxide, sulfur dioxide, or bromine or iodine vapor. Chlorine produced a light yellow color.
The object of the present patent application is an agent for coloring keratin fibers based on oxidative dye precursors and containing (a) at least one hydrazone derivative of formula (I) or a physiologically compatible salt thereof, (b) at least one coupler or a physiologically compatible salt thereof, and
(c) a persulfate salt as oxidant; a multicomponent kit and a method for coloring keratin fibers by use of said agent.