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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]
Though primarily intended for hair removal, chemical depilatory, such as Nair and shaving powder, also function as a chemical exfoliant. Such products contain calcium hydroxide and/or thioglycolic acid. They are applied more frequently than waxing (once a week) since they only partially destroy the hair below the skin, rather than pulling up ...
A galvanic hair remover is essentially a positive ground power supply that delivers 0–3 milliamperes through the body. The follicular probe is the cathode of an electrolytic cell. Sodium hydroxide formed at the cathode by the process of chemical electrolysis kills the hair matrix cells. Modern galvanic hair removers automatically adjust the ...
Rosemary Oil. A very common oil included in natural hair growth products, studies have noted the efficacy of rosemary in promoting hair growth. In one study, results showed that rosemary oil may ...
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]
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