[Effect of a synthetic detergent (Syndet) on the pH of the skin of infants]

Hautarzt. 1986 Jun;37(6):329-34.
[Article in German]


The long- and short-term effects on the skin of infants of a synthetic detergent (syndet) with an acid pH were investigated and compared to ordinary soap. The short-term effect was determined by measuring the skin pH on different parts of the body before and 20 min after washing with syndet. The long-term effect was tested in a second group, in which the infants were washed either with ordinary soap or with syndet for 3 days. The skin pH was measured 4-5 h after washing. The results were evaluated statistically. The results show that for a short time syndet displaces the skin pH towards acid pH in younger infants; however, the skin pH is not influenced in older infants. Syndet keeps the skin pH in the physiological range for a longer time after washing than ordinary soap.

Publication types

  • Comparative Study
  • English Abstract

MeSH terms

  • Acid-Base Equilibrium / drug effects*
  • Detergents / pharmacology*
  • Humans
  • Hydrogen-Ion Concentration
  • Infant
  • Infant, Newborn
  • Long-Term Care
  • Skin / drug effects*
  • Soaps / pharmacology
  • Surface-Active Agents / pharmacology*


  • Detergents
  • Soaps
  • Surface-Active Agents