Salicylic Acid - Khoom
Cov khoom no yog dawb zoo koob siv lead ua los yog dawb crystalline hmoov; tsis muaj ntxhiab los yog yuav luag tsis muaj ntxhiab; aqueous tov qhia tau hais tias acidic tshuaj. Cov khoom no yog yooj yim soluble nyob rau hauv ethanol los yog ether, soluble nyob rau hauv boiling dej, me ntsis soluble nyob rau hauv trifluoromethane, me ntsis soluble nyob rau hauv dej.
Taw qhia rau Salicylic Acid
Salicylic acid, tseem hu ua salicylic acid, yog cov hmoov dawb crystalline, tsis muaj ntxhiab, nrog me ntsis iab saj thiab tom qab ntawd pungent saj. Nws muaj nyob rau hauv willow bark, dawb pearl nplooj thiab qab zib birch nyob rau hauv qhov xwm. Cov tshuaj formula C6H4(OH)(COOH), melting point 157-159 ℃, maj mam hloov xim nyob rau hauv lub teeb. Tus txheeb ze ntom ntom yog 1.44. Kub taw tes yog hais txog 211 ° C / 2.67kPa. Sublimation ntawm 76 ° C. Nyob rau hauv ib txwm muaj siab, nws tuaj yeem decomposed rau hauv phenol thiab carbon dioxide los ntawm cua kub ceev. Soluble hauv ethanol, ether, chloroform, benzene, acetone, turpentine, tsis yooj yim soluble hauv dej. 1 g ntawm salicylic acid yuav yaj nyob rau hauv 460 ml ntawm dej, 15 ml ntawm boiling dej, 2.7 ml ntawm ethanol, 3 ml ntawm acetone, 3ml ntawm ether, 42 ml ntawm chloroform, 135 ml ntawm benzene, 52 ml ntawm turpentine, txog 60 ml ntawm 0 ml ntawm glycerin. ether. Ntxiv sodium phosphate, borax, thiab lwm yam tuaj yeem ua rau kom cov kua qaub salicylic nyob rau hauv dej. pH ntawm aqueous salicylic acid yog 2.4. Salicylic acid thiab ferric chloride aqueous kua tsim cov xim liab tshwj xeeb.
Tej zaum koj yuav tsis tau hnov txog salicylic acid, tab sis koj yuav tsum paub txog cov tshuaj aspirin. Qhov tseeb, cov tshuaj aspirin yog ib qho derivative ntawm salicylic acid.Ntxiv rau cov hluavtaws salicylic acid hauv qee cov tshuaj, ntuj salicylic acid kuj muaj ntau yam khoom noj, xws li ntau cov txiv hmab txiv ntoo, zaub, kas fes, tshuaj yej, txiv ntseej, txuj lom thiab zib mu. Cov natural salicylic acids yog cov nroj tsuag A txhais tau tias tiv thaiv tus kheej tiv thaiv kab tsuag, fungi thiab kab mob.Txawm li cas los xij, salicylic acid, txawm tias ntuj lossis hluavtaws, tuaj yeem ua rau muaj kev phiv tshuaj rau qee tus neeg.Salicylate intolerance feem ntau cuam tshuam nrog cov tshuaj koj noj, txij li cov tshuaj. zoo li cov tshuaj aspirin muaj cov salicylates ntau dua piv rau cov khoom noj. Piv txwv li, kev noj haus ntawm salicylic acid feem ntau yog 10-200 mg ib hnub twg, piv rau 325-650 mg rau ib koob tshuaj aspirin.Studies tau pom tias cov tshuaj aspirin ua rau muaj kev pheej hmoo ntawm kab mob plab.
Salicylic Acid - Muab piv nrog AHAs rau Cosmetic Effects
Salicylic acid (BHA) yog muab rho tawm los ntawm willow bark thiab holly nplooj, tseem hu ua zaub acid; txiv hmab txiv ntoo acid (AHA) yog muab rho tawm los ntawm qab zib; nws yog ib qho kua qaub rho tawm los ntawm ob yam khoom raw. Ob leeg muaj peev xwm tswj tau roj, exfoliate, tshem pob txuv, ntsws pores, thiab fade tseg blemishes. Cov txiv hmab txiv ntoo acid tev uas muaj ntau tshaj 50% tsuas yog ua tau los ntawm kws kho mob dermatologist, thaum salicylic acid tev yog cais raws li kev kho mob tsis hais qhov concentration. Nws yog tsim nyog sau cia tias ob peb tus neeg tsis haum rau kev siv cov concentration ntawm dej. Salicylic acid, yog li kev kho kom zoo nkauj dav siv tsis tuaj yeem siv nws. Nws raug tso cai los ua daim tawv nqaij tev tawm nrog cov ntsiab lus ntawm cov txiv hmab txiv ntoo acid qis dua 40% hauv cov chaw kho kom zoo nkauj. Hauv kev sib piv, txiv hmab txiv ntoo acid muaj kev nyab xeeb dua li salicylic acid. Raws li rau cov nyhuv, salicylic acid tsuas yog kaw nyob rau hauv lub superficial stratum corneum, nws tsuas plays lub luag hauj lwm ntawm kev kho yooj yim thiab thaiv, thiab kev hloov ntawm daim tawv nqaij kev ntxhib los mos tsuas yog ib ntus, thaum txiv hmab txiv ntoo acid nkag mus rau hauv lub dermis rau fundamentally hloov daim tawv nqaij kev ntxhib los mos, uas kho tau. Yog lawm, xws li pob txuv pits tsim los ntawm kev puas tsuaj dermis, cov nyhuv ntawm salicylic acid tsis muaj zog, yog li salicylic acid tsis tuaj yeem hu ua "salicylic acid peeling", nws tsuas yog hu ua "salicylic acid kho". Kev nyab xeeb thiab cov nyhuv ntawm salicylic acid tev thiab txiv hmab txiv ntoo acid tev yog txawv, vim hais tias txiv hmab txiv ntoo acid tsis muaj tshuaj lom thiab siv tau los ntawm qis mus rau siab (8% -15% -20% -30% -40%), maj mam hloov mus rau nws yuav tsis ua rau tawv nqaij kub hnyiab, disfigurement los yog tej yam kev mob tshwm sim. Thiab salicylic acid yog tshuaj lom, siab heev yog tsis haum rau siv rau ntawm lub ntsej muag, muaj ib tug tej yam concentration txwv, salicylic acid nrog ib tug concentration ntawm 3% -6% yuav siv tau rau exfoliation, siab tshaj 6% Corrosive rau ntawm daim tawv nqaij. , siab concentration ntawm 40% salicylic acid muaj zog keratin corrosive zog.
Salicylic acid ua dab tsi?
Raws li cov kev cai ntawm Lub Xeev Saib Xyuas Khoom Noj thiab Tshuaj (CFDA), qhov txwv siab tshaj ntawm cov tshuaj pleev ib ce yog 2%. Nws tau raug pov thawj tias 0.5% -2% salicylic acid yog qhov zoo rau kev kho pob txuv. Nws tsis pom zoo kom koj nrhiav cov khoom uas muaj siab dua. Qhov no concentration yog txaus kom ua tau zoo.
Salicylic acid tuaj yeem yaj cov cement ntawm cuticles thiab ua rau cuticles poob, yog li nws tuaj yeem tshem tawm cov cuticles tuab thiab txhawb cov metabolism.
Daim tawv nqaij metabolism: Lub luag haujlwm tseem ceeb ntawm stratum corneum ntawm daim tawv nqaij yog los tiv thaiv cov hlwb ntawm txhua txheej ntawm daim tawv nqaij. Cov metabolism ntawm cov hlwb epidermal txheej los ntawm txheej yuav txav mus rau sab nraud. Ntuj crumbs. Cov keratin qub uas tsis poob ib txwm yuav ua rau cov tawv nqaij zoo li ntxhib thiab npub, ua rau cov tawv nqaij metabolism qeeb, thiab tseem tsim pob txuv los thaiv qhov pores.
Cov nyhuv ntawm exfoliation: Salicylic acid tuaj yeem tshem tawm cov cuticle ntau dhau, thiab tib lub sijhawm txhawb kev rov ua dua tshiab ntawm cov hlwb epidermal; Yog hais tias cov hlwb epidermal yog cov tshiab thiab cov hlwb uas muaj qhov tseem ceeb, nws yuav ua rau cov tawv nqaij du thiab muag heev.
Shrink pores: Salicylic acid yog rog-soluble, thiab tuaj yeem nkag mus rau hauv cov txheej txheem sib sib zog nqus ntawm cov pores raws cov qog sebaceous uas tso cov roj, uas muaj txiaj ntsig zoo rau yaj cov qub cuticles hauv qhov hws thiab txhim kho qhov teeb meem ntawm cov pores, yog li nws tuaj yeem thaiv. tsim pob txuv thiab shrink nws Stretched pores.
Tiv thaiv pob txuv: Salicylic acid ua rau cov hlwb ntawm cov plaub hau follicle phab ntsa, uas tuaj yeem pab tshem tawm cov hauv paus plaub hau thiab kho cov kab mob txawv txav. Nws tuaj yeem tiv thaiv qhov pore blockage rau cov pob txuv me thiab ua haujlwm zoo tshaj plaws rau blackheads. Nws tuaj yeem txo cov plaub hau follicle phab ntsa Tsis zoo li exfoliation, tiv thaiv cov kab mob tshiab, tab sis tsis muaj kev cuam tshuam rau kev txo qis sebum secretion thiab tshem tawm pob txuv bacilli.
Lub luag haujlwm ntawm salicylic acid yog ntxuav cov laus cutin, ua rau daim tawv nqaij zoo dua, thiab tsis tshua muaj pob txuv.
Hu rau: Yoyo Liu
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Post lub sij hawm: Mar-08-2023
