Thioglycolic acid yog cov kua tsis muaj xim uas muaj ntxhiab tsw tsw. Cov mis ntawm cov tshuaj no yog HSCH2COOH. Acid feem ntau yog siv los curl plaub hau. Tab sis dab tsi cuam tshuam nws tuaj yeem ua rau tib neeg lub cev? Nws muaj dab tsi, thiab nws siv nyob qhov twg?
Solubility
Vim qhov tseeb tias thioglycolic acid muaj ntau pab pawg ua haujlwm, nws muaj cov solubility zoo nyob rau hauv ntau lub ncov qaumteb qabteb, tsis muaj zog polar thiab non-polar solvents. Cov no suav nrog dej, ntau yam cawv thiab cov kuab tshuaj organic xws li chloroform thiab benzene. Nrog rau tag nrho cov tshuaj no, cov kua qaub tuaj yeem sib tov hauv txhua qhov sib piv. Thioglycolic acid tsis tuaj yeem yaj hauv aliphatic hydrocarbons, xws li hexane.
Qhov kev ruaj ntseg ntawm cov kua qaub aqueous nyob ntawm ob yam: qhov siab thiab qhov kub thiab txias. Txhawm rau kom cov tshuaj nyob ruaj khov, nws yog ib qho tsim nyog yuav tsum muaj qhov concentration ntawm cov kua qaub tsis ntau tshaj 70%, thiab qhov kub thiab txias yog li 20 degrees Celsius. Thaum ua tsis tiavRaws li cov xwm txheej no, thioglycolic acid tau dhau los ua tus kheej-esterification txheej txheem.
tshuaj muaj zog
Txij li cov kua qaub no yog carboxylic acid nrog thiol ua haujlwm pab pawg, nws tuaj yeem nkag mus rau hauv txhua qhov kev cuam tshuam cov yam ntxwv ntawm carboxylic acids thiab thiols. Cov no suav nrog kev cuam tshuam nrog cov ntsiab lus yooj yim, uas ua rau muaj ntau yam ntsev. Thaum cuam tshuam nrog cawv los ntawm cov tshuaj tiv thaiv esterification, esters yuav raug tsim. Nws tseem tuaj yeem tau txais ntau yam amides, sulfides, thiolates. Koj tuaj yeem ua cov tshuaj tiv thaiv los hloov cov pab pawg ua haujlwm, lossis ntxiv cov tshiab. Thaum raug oxidizing tus neeg sawv cev muaj zog, pawg thiol raug cuam tshuam, ua rau tsim cov sulfoacetic acid (HSO3CH2COOH).
Hauv cov tshuaj alkaline, kua qaub tuaj yeem oxidize. Cov tshuaj tiv thaiv no xav tau catalysts, uas tuaj yeem yog ntsev ntawm tooj liab, manganese lossis hlau. Raws li qhov tshwm sim ntawm acid oxidation, dithiodiglycolic acid yog tsim, cov mis ntawm uas yog (HOOCCCH 2S)2.
YSiv thioglycolic acid
Cov tshuaj no yog siv dav hauv cov plaub hau curling thiab xim. Nyob rau hauv ib tug nplua nuj assortment ntawm kev npaj uas yog siv rau perm, thioglycolic acid nws tus kheej los yog nws derivative tebchaw, xws li ntsev, yog siv. Cov kua qaub no, vim nws cov khoom hloov pauv, muaj cov txiaj ntsig zoo. Nws yog qhov sib xyaw nrog thiolCov pab pawg ua haujlwm tuaj yeem ua rau cov qauv plaub hau ntawm qhov kub ib txwm rau ib tus neeg, uas yog, ntawm 36.6 degrees Celsius. Kev tsim cov plaub hau tshiab tshwm sim vim muaj kev sib cuam tshuam ntawm thioglycolic acid derivatives nrog ib tug sulfide choj nyob rau hauv cov amino acid (cystine), uas muaj nyob rau hauv keratin, uas yog lub hauv paus ntawm cov plaub hau. Yog li ntawd, cov derivatives ntawm cov kua qaub no tau siv dav hauv thaj chaw no.
Tab sis kuj tseem muaj qhov tsis zoo rau kev siv thioglycolic acid rau curling. Piv txwv li, vim muaj kev cuam tshuam zoo li no, ntau cov hydrosulfide acid (H 2 S) thiab mercaptans raug tso tawm. Nws yog vim hais tias ntawm cov tshuaj no ua rau ib tug ntse thiab tsis kaj siab tsw tshwm. Tsis tas li ntawd, cov tshuaj no yog tshuaj lom rau tib neeg. Lawv tuaj yeem ua rau mob taub hau, qaug zog, tsis xis nyob, thiab lwm yam.
Harm
Kev siv cov concentrated thioglycolic acid muaj qhov ua kom khaus tawv nqaij ntawm tib neeg. Tsis tas li ntawd, muaj kev khaus ntawm cov mucous ntawm lub qhov muag thiab qhov ntswg. Nws raug sau tseg tias cov tshuaj diluted muaj qhov tsis pom tseeb zoo li no. Cov ntsev ntawm thioglycolic acid tuaj yeem ua rau ntau yam kab mob ntawm daim tawv nqaij, nrog rau eczema. Thioglycolates, dhau los, ua rau dermatitis.
Cov chav kawm txaus ntshai ntawm thioglycolic acid raws li UN yog 8. Cov chav kawm no suav nrog cov tshuaj uas, tom qab kev sib cuag, kev puas tsuaj rau daim tawv nqaij thiab cov mucous membranes tshwm sim, thiab cov tebchaw uas, thaum hlawv, emit lom thiab txaus ntshai.tshuaj.
Thioglycolic acid yog cov tshuaj lom neeg lom zem heev. Thaum ua kev sim rau nas, LD 50 tau txiav txim, uas tsuas yog 50 mg rau 1 kg ntawm lub cev hnyav.
Kev Tiv Thaiv
Kev ceev faj tshwj xeeb yuav tsum tau muab rau cov kws kho plaub hau, vim lawv feem ntau ua haujlwm nrog thioglycolic acid. Nws yog ib qho tsim nyog yuav tsum siv cov tshuaj diluted, pH uas yuav nyob ze rau nruab nrab, uas yog, txog 7. Tsis tas li ntawd, nws yog ib qho tsim nyog yuav tsum tau ua haujlwm nrog cov hnab looj tes tiv thaiv cov tawv nqaij ntawm tes los ntawm kev puas tsuaj uas cov kua qaub tuaj yeem ua rau.
Tsis txhob siv cov khoom uas muaj thioglycolic acid yog tias muaj cov kab mob ntawm daim tawv nqaij, nws yuav ua rau muaj kev puas tsuaj ntau dua.
Yog li, cov kws txiav plaub hau thiab cov neeg uas feem ntau perm lawv cov plaub hau yuav tsum tau xyuam xim tshwj xeeb rau cov khoom no, raws li kev ceev faj yuav tsum tau ua kom lawv noj qab haus huv.
