Phenol P - Phenolphthalein

SKU: 1045000

For Solid Soaps:  Phenol P (Phenolphthalein) is not necessary in making solid soaps as proper superfatting will ensure that your soap is not "lye heavy". If you feel the need to be sure, shave some soap into hot water and stir until fully dissolved and cooled. Then proceed as below.
For Liquid Soaps: Be sure your finished liquid soap products is not "lye-heavy". If you don't have or don't choose to use a digital pH meter, Phenol P is essential in making liquid soaps.
At pH of 8.2 or less (more acidic), phenolphthalein is colorless in solution. At pH above 8.2  (more basic), Phenolphthalein begins to become faintly pink, gradually turning a deeper fuchsia color as pH rises toward about 12. Liquid soaps generally have a "neutralized" pH of from around 9.2 to about 10.2, depending on the oils used. For instance, Coconut oil can be 'nudged' down below pH 9 using Citric Acid (a touchy procedure). Therefore, a liquid soap made from Coconut and other oils will present a very light to fairly light pink when seen in a glass plate over a white surface.
When "neutralizing" your soap with borax, use Phenolphthalein (PhenolP) to verify your results: Pour about 1 ounce of your diluted liquid soap into a small clear glass plate and add a drop of Phenol P to it. Stir it gently and let it settle, then hold the glass against a white sheet of paper under a fairly strong light. If the solution is clear or just very, very slightly pinkish, it's as "neutralized" as it will get. If it's a stronger pink or reddish, add some warm borax-in-water solution to your diluted soap batch and use Phenol P to test again with a new sample (Borax will 'buffer' the solution toward 9.2 pH and no lower). Repeat additions a small amount at a time until it tests very slightly pinkish seen over a white surface and you're done! There's a lot of information here, so read it again before using Phenol P (Phenolphthalein).
Toxicity, Handling & Storage: Be careful using Phenol P (Phenolphthalein) - Although only a 1% concentration in an alcohol/water solution, Phenolphthalein is the active ingredient that used to be used in Ex-Lax and can be absorbed through the skin. Make your own conclusion here. Additionally, it was withdrawn from use in Ex-Lax or an other such product because it can potentially have other undesirable effects when ingested or absorbed (particularly per the state of California). Use nitrile gloves and avoid skin contact. Store securely closed in a safe, cool and dry location out of the reach of children. Wipe up any spills thoroughly.