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Ammonium thioglycolate : ウィキペディア英語版
Ammonium thioglycolate

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Ammonium thioglycolate, also known as perm salt, is the chemical compound with the formula HSCH2CO2NH4. It finds extensive use in perm-ing hair.〔(United States' National Library of Medicine: Ammonium Thioglycolate )〕
==Chemistry==
Being the salt of a weak acid and weak base, ammonium thioglycolic acid exists in solution as an equilibrium mixture of the salt itself as well as thioglycolic acid and ammonia:
:HSCH2COO + NH4+ (unicode:⇌) HSCH2COOH + NH3
Thioglycolate, in turn, is able to scission disulfide bonds, capping one side with a hydrogen and forming a new disulfide with the other side:
:RSH + R'SSR' (unicode:⇌) R'SH + RSSR'

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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