설명(영) |
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Compounds in this class contain a sulfur atom exhibiting a valence of +4 in the classical sense. In addition, they possess a C-S bond. The C-S bond is stable to hydrolysis, in contrast to the C-O-S bond found in Sulfuric Acid Esters. This structure:
in which M+ represents a suitable cation, pertains to many cosmetic materials, such as aromatic sulfonic acids, (e.g., Aluminum Phenolsulfonate or Sodium Polystyrenesulfonate); compounds possessing a propyl or hydroxypropyl sulfonate grouping, the so-called amphoteric sultaines (see Betaines) (e.g., Tallowamidopropyl Hydroxysultaine); and substituted (acylated) taurates (e.g., Sodium Lauroyl Taurate).
The aromatic sulfonates are commonly used as hydrotropes and have diverse specialized uses in cosmetics. Sulfonic acid derivatives with attached fatty alkyl or acyl chains find uses as surfactants in cleansing preparations. |