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Chemical depilatories contain 5–6% calcium thioglycolate in a cream base (to avoid runoff). Calcium hydroxide or strontium hydroxide maintain a pH of about 12. Hair destruction requires about 10 minutes. Depilation is followed by careful rinsing with water, and various conditioners are applied to restore the skin's pH to normal.
Calcium hydroxide is modestly soluble in water, as seen for many dihydroxides. Its solubility increases from 0.66 g/L at 100 °C to 1.89 g/L at 0 °C. [8] Its solubility product K sp of 5.02 × 10 −6 at 25 °C, [1] its dissociation in water is large enough that its solutions are basic according to the following dissolution reaction:
Calcium hydroxide is an active ingredient that chemically breaks down the hair for removal. [6] Some formulations also contain potassium thioglycolate, which breaks down the disulfide bonds in the hair's keratin. [6] The products often include softening agents, such as mineral oil, to help offset the harsh active ingredients. [6]
Veet's hair removal products contain thioglycolic acid and potassium hydroxide. These ingredients react to generate the depilatory chemical potassium thioglycolate, which according to the company, increases hair loss. The effect is to break the disulfide bonds of the keratin molecules in hair. [2]
Hair removal is the deliberate removal of body hair or head hair. This process is also known as epilation or depilation . Hair is a common feature of the human body, exhibiting considerable variation in thickness and length across different populations.
Electrology is the practice of electrical hair removal to permanently remove human hair from the body. Electrolysis is the actual process of removing hair using electricity. In electrolysis, a qualified professional called an electrologist slides a hair-thin, solid metal probe into each hair follicle without puncturing the skin (when inserted ...
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This product, known as "bleaching powder" or "chlorinated lime", it is used in many of the same applications as sodium hypochlorite, but is more stable and contains more available chlorine. It is usually marketed as a white powder that contains, besides the hypochlorite, also calcium hydroxide Ca(OH) 2 ("lime") and calcium chloride CaCl 2. [21]