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Phenolphthalein 1% Solution

Phenolphthalein 1% Solution

Phenolphthalein is a clear liquid that is commonly used to determine the pH level of soap and test for excess lye. Phenolphthalein will react by turning pink or fuschia in the presence of excess lye, with the degree of pink indicating how alkaline your soap is. If a drop of solution applied to the middle of a soap cut turns deep pink or fuchsia, the soap should not be used on the skin, but could be used as a house or laundry soap. If the solution remains clear or turns the lightest shade of transparent pink, the soap should be safe for the skin. Phenolphthalein can also be used to test liquid soap and cream soap.

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Product Details:

  • Phenolphthalein
  • 1% Phenolphthalein Solution
  • Phenolphthalein is a clear liquid commonly used to determine the pH level of soap and test for excess lye
  • Phenolphthalein can be used to test bar soaps, liquid soaps and cream soaps

How to use:

  • Phenolphthalein will react to the presence of excess lye by turning pink or fuschia, with the degree of pink indicating how alkaline your soap is.
  • If a drop of solution is applied onto the soap and turns a deep pink or fuschia, the soap should not be used on the skin. This type of soap could be used instead as a house or laundry soap
  • If the liquid solution stays clear or turns a very light transparent shade of pink, it should be fine to use on the skin.

Technical Information:

  • CAS#: 67-63-0 / 7732-18-5 / 77-09-8
  • Appearance: Clear, Colorless Liquid
  • Odor: Characteristic Odor
  • Relative Density (Specific Gravity): 0.8

Technical Documents:

California Prop Statement:

This product is known to contain a component that is listed under California Proposition 65. Please refer to the SDS for more information.

The following statement is made in order to comply with the reporting requirements of the California Safe Drinking Water and Toxic Enforcement Act of 1986. We are conforming to the regulation by reporting the existence, or lack thereof, of ingredients deemed reportable by the above-mentioned regulations.

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