Abstract
Pure and commercial surfactants were tested for their ability to cause granule lysis. Lytic ability increased with alkyl chain length in homologous series of alkyl isethionates, sulphates and carboxylates. Using pure surfactants of the same chain length (C 12), but different head groups, it was found that lytic ability of anionic surfactants increased with the polarity of the head group, and also that the inclusion of a bulky hydrophilic group such as a triethoxy moiety increased the potency of the parent surfactants. For the nonionic alcohol ethoxylates tested, lytic ability increased with the number of ethoxy units present. The significance of these results and those obtained for the commercial detergents is discussed in the light of their known in vivo skin irritancy.
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