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The pH of the liquids was not significantly changed by the extended exposure emollient. Data in Table 2 show that the pH of aqueous solutions is not significantly affected by contact with the emollient. All solutions remained close to a neutral 7 pH even after exaggerated exposure to the emollient. Same results were achieved when the experiment was repeated with the vial coated with 1 g of melted emollient and filled with 20 g of 0.9% saline solution. The measured pH in the coated versus uncoated vials were 6.91 and 7.26 respectively.

Table 2. pH of aqueous solutions after contact with emollient versus control

Table 3. Measured pH of skin-mimic collagen film surface was unchanged with or without application of emollient up to 24 h