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PH could be dertermined by just looking at the chemical color

  1. Mar 31, 2005 #1
    I a have a broad background in chemistry so I know the basics. I was looking at a tanning product and this was the guy's big claim "All these ingredients have high pH levels of over 6! What does this mean? A pH of over 6 is the COLOR ORANGE!" Now, I wasn't aware that pH could change the color of chemicals when applied to skin or any other surface not created for testing pH. I mean if pH could be dertermined by just looking at the chemical color what would be the point of pH paper. I don't know, is his claim a bunch of crap? Besides arn't all the colors over 6 not orange, lol?
  2. jcsd
  3. Mar 31, 2005 #2
    Normal skin pH is between 5.5 and 6.5. The drier the skin the lower the pH.
    All effective sunless tanners contain DHA. It is a colourless 3-carbon sugar that when applied to the skin causes a chemical reaction with amino acids in the surface cells of the skin producing a darkening effect DHA does not damage skin as it only affects the outermost cells of the epidermis (stratum corneum).
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