Zinc oxide Hydroxyquinoline

Fischer T. On 8-hydroxyquinoline-zinc oxide incompatibility. Dermatologica (1974) 149,... 

Metal chelates of 8-hydroxyquinoline such as (111) with photoconductive properties are reported to be useful in electrophotographic systems.233 The incorporation of a tin complex into a photo-conductive zinc oxide layer is stated to reduce dark decay . In other words, the electrostatic charge applied to the photoconductor has a longer lifetime. Two of the complexes disclosed for this application are (112) and (113). These compounds are prepared from dibutyltin oxide by reaction with 2-mercaptopropionic add and thioglycolic acid, respectively 234... 

The presence of zinc oxide inhibits the therapeutic effects of hydroxyquinoline in ointments. 

The observation that a patient had an allergic reaction to hydroxyquinoline in ointments with a paiafQn base, but not a zinc oxide base, prompted further study of a possible incompatibility. The subsequent study in 13 patients confirmed that zinc oxide reduces the eczematogenic (allergic) properties of the hydroxyquinoline. However, it also inhibits its antibacterial and antimycotic effects, and appears to stimulate the growth of Candida albicans. ... 

The documentation is limited but the reaction appears to be established. There is no point in using zinc oxide to reduce the allergic properties of hydroxyquinoline if, at the same time, the therapeutic effects disappear. 

The 4-aminophenazone method (see under Phenol, p. 514) has been applied by Savidge to a cream containing 7-5 per cent of zinc oxide and 0 1 per cent of potassium hydroxyquinoline sulphate. 

Polymers containing 8-hydroxyquinoline appear to be selective adsorbents for tungsten in alkaline brines (95). In the presence of tartrate and citrate, quinaldic acid [93-10-7] allows the separation of zinc from gallium and indium (96). Either of these compounds can selectively separate lead and zinc from oxide ores as complexes (97). It is also possible to separate by extraction micro quantities of rhenium(VII), using quinoline in basic solution (98). The... 

About 100 fungicides me required for these various uses in the United States. The principal ones are sulfur, liine-sulfur (polysulfides of calcium) copper sulfate (or ils equivalent in the oxides, basic sulfates, oxychloride and other relatively insnluhle copper compounds) creosote products and zinc chloride, both used as wood preservatives and a wide variety of organic compounds. Among the latter are several dithiocarbamates. such as ferbam and zineb, and other thio compounds, like N-(trichloronielhyllhio>-phthalimide (folpel) cis-NfI Irtchloroniclhy] Jthio)-4-cyclohexane- 1.2-dicaiboxyimide (captan) and 8-hydroxyquinoline. 

When A1 is alloyed with Mg(as for use in some incendiary, tracer of photoflash compns), the tests and detns for such alloys include a)Granulation, using US Std sieves b) Moisture, by drying in a vacuum desiccator over HjSO for 24 hrs c)Grease d fats, by extraction with ether d)Aluminum, using 8-hydroxyquinoline reagent e)Mag-nesium f)Total Al and Mg g)Oxides as A1 jO, h)Silicon i)Iron j)Zinc k)Other metals l)Grit... 

Poly (hexamethylenebiguanide) hydrochloride preservative, mouthwashes Bromochlorophene Chlorhexidine digluconate preservative, mucilage Sodium salicylate preservative, nebulizer solutions Potassium bisulfite preservative, nontherapeutic 8-Hydroxyquinoline preservative, nonwovens Poly (hexamethylenebiguanide) hydrochloride preservative, NR latex Tetramethylthiuram disulfide Zinc diethyidithiocarbamate preservative, oil field chemicals Dimethyl oxazolidine preservative, oil recovery Tributyltin oxide preservative, oils Maleic acid... 

Classical noninstrumental methods are used in routine analysis due to their easily accessible laboratory equipment required for implementation. In addition, they are often the official methods proposed by the corresponding government commissions. Acid-base titrations are used for ingredients that present acid-base properties (e.g., potassium and/or sodium hydroxides), iodometric titrations for the determination of oxidizing agents (e.g., hydrogen peroxide in hair-care products) even gravimetric determinations are carried out (e.g., oxalic acid and/or its alkaline salts by precipitation with calcium or zinc by 8-hydroxyquinoline). 

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