Sodium hyaluronate - pH increase
Some company was to prepare a sample of the product with sodium hyaluronate for me. I noticed that instead of a pH 5, the product had a pH 6. The ingredients were tested separately and it was found that sodium hyaluronate caused the increase. The problem was not resolved and I gave up on it, but I wonder what could be causing this increase? I guess the possible cause was that the sodium hyaluronate may not have been fully dissolved while making the sample. A slight increase in pH was observed a few hours after making the sample, and it increased over the following days. Any ideas? It was high molecular weight sodium hyaluronate at 0,40%.
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