How Does Thioglycolate Hair Remover Work?

Biology, Chemistry
Hair: men bemoan its loss and women fret over its appearance. For decades during the 20th Century, women were enamored by the so-called permanent wave. The most common process for assuring permanency of a hairstyle obtained at the beauty parlor involved a chemical process involving thioglycolate. See, Permanent Wave: Chem-mystery of Curl. By Extension... Although this process was used, not to remove hair, but to beautify it, by extension, a closely related process has been used to eliminate hair that grows¹ in undesired places. Notice this chemical reaction that occurs when thioglycolate is used to remove hair². 2 HOOC-CH₂-SH + R-S-S-R → HOOC-CH₂-S-S-CH₂-COOH + 2 R-SH The above reaction reads: two thioglycolic acid molecules plus one cystine (disulfide hair bond) produces two dithioglycolic acid molecules and two cysteine molecules. To…
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What Gives Boiled Eggs Sulfur Smell? Is Sulfur Bad for You?

Food, Health
[caption id="attachment_15992" align="alignright" width="440"] Hardboiling eggs.[/caption] Peel a boiled egg, break it open, and you will detect the distinct boiled eggs sulfur smell. Now foods do not contain sulfur (symbol S) in its elemental form. Rather, they contain compounds that include sulfur in their composition. What sulfur-containing compounds do we find in hen's fruit? In themselves, they are nutritious—even essential—compounds. Boiled Eggs Sulfur Smell: Amino Acids Eggs contain proteins such as albumin. Proteins are amino acids that have joined together. Amino acids are nutritious chemicals that contain nitrogen. Most amino acids do not contain sulfur. However, two do contain sulfur in addition to nitrogen—methionine and cysteine. In fact, they contain nitrogen and sulfur in equal amounts. The chemical formula of methionine is C5H11NO2S. Cysteine is C3H7NO2S. Boiled Eggs Sulfur Smell:…
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