Pyridinium salicylate

One other industrial application of cationic drag reducing additives is found in oil and gas production where cetyltrimethylammonium salicylate and cetyl pyridinium salicylate have been found simultaneously to reduce drag and inhibit corrosion of tubular steel injection lines [86]. 

As in the case of the concentration dependence of the chemical shift, the H and 13C band shapes of the surfactant resonance peaks are also concentration dependent. Analysis of H NMR band shapes for large aggregates of a cetyl trimethyl ammonium bromide-water system results in a CMC of 1.0 mM this is consistent with the value measured by other methods.57 The H NMR bands of alkyl trimethyl ammonium salicylate and hexadecyl pyridinium salicylate aqueous systems start to broaden at concentrations just above the CMC. The broadening continues up to a concentration above which the band shape is almost constant, as the concentration is further increased.-58 I3C NMR linewidth analysis of sodium octanoate in aqueous solution gives reasonable estimated CMC values.59... 

Active agents vary according to use. For controlling bad breath, zinc salts, sodium lauryl sulfate, and flavors are used. To destroy oral micro-organisms, chlorhexidine, cetyl-pyridinium chloride [123-03-5], and benzalkonium chloride [68391-01-5] are valuable. Essential oils, such as thymol [89-83-8], eucalyptol [470-82-6], menthol, and methyl salicylate [119-36-8] reduce plaque-related gingivitis. Sodium fluoride aids in caries control. 

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