Qhov sib txawv tseem ceeb ntawm glycolic lactic thiab salicylic acid yog cov khoom uas muaj glycolic acid yog tsim rau cov tawv nqaij rhiab, thiab cov khoom uas muaj lactic acid yog tsim rau cov tawv nqaij qhuav thiab paub tab, whereas cov khoom uas muaj salicylic acid yog haum rau pob txuv. daim tawv nqaij.
Muaj ntau ntau hom khoom siv tawv nqaij muaj nyob hauv khw uas haum rau ntau hom tawv nqaij. Glycolic acid, lactic acid, thiab salicylic acid yog cov khoom xyaw tseem ceeb hauv cov khoom no.
YGlycolic Acid yog dab tsi?
Glycolic acid yog cov organic compound uas muaj cov tshuaj formula C2H4O3. Nws raug txheeb xyuas tias yog qhov yooj yim tshaj plaws alpha hydroxy acid (AHA). Yog li ntawd, cov organic molecule no muaj ib pawg carboxylic functional (-COOH) thiab ib pawg hydroxyl (-OH) sib cais los ntawm tsuas yog ib tug carbon atom. Glycolic acid yog xim tsis muaj xim, tsis muaj ntxhiab, thiab muaj kuab heev hauv dej. Tsis tas li ntawd, nws yog hygroscopic.
Cov molar loj ntawm glycolic acid 76 g / mol, thaum lub melting point ntawm no compound yog 75 ° C. Txawm li cas los xij, nws tsis muaj qhov kub hnyiab vim nws decomposes ntawm qhov kub siab dua. Qhov tseem ceeb ntawm daim ntawv thov no compound yog nyob rau hauv lub cosmetic kev lag luam. Cov neeg tsim khoom siv cov khoom sib xyaw no ua cov khoom siv hauv cov khoom siv tawv nqaij. Lawv ua cov tshuaj no los ntawm cov tshuaj tiv thaiv ntawm formaldehyde thiab synthesis gas nrog rau cov catalyst vim tias cov tshuaj tiv thaiv no muaj tus nqi qis. Tsis tas li ntawd, cov kua qaub no muaj zog me ntsis dua li acetic acid vim nws lub zog rho tawm hluav taws xob (ntawm pawg hydroxyl).
YLactic Acid yog dab tsi?
Lactic acid tuaj yeem piav qhia raws li cov organic compound uas muaj cov tshuaj formula CH3CH(OH)COOH. Thaum xav txog nws lub xeev cov khoom, qhov sib xyaw no yog cov hmoov dawb, thiab nws yog miscible nrog dej. Thaum nws yaj hauv dej, lactic acid tsim cov xim tsis muaj dej. Peb tuaj yeem muab nws lub npe hu ua alpha-hydroxy acid vim nws muaj pawg hydroxyl nyob ib sab ntawm pawg carboxyl. Cov tshuaj no muaj txiaj ntsig zoo li cov khoom sib xyaw nruab nrab hauv qee cov organic synthesis industries. Nws tseem yog lub npe hu ua mis nyuj acid vim mis nyuj muaj nplua nuj nyob hauv lactic acid.
Cov lactic acid compound yog chiral compound. Nws muaj ob enantiomers hu ua L-lactic acid thiab D-lactic acid. Racemic lactic acid yog sib npaug sib npaug ntawm ob enantiomers. Qhov kev sib tw racemic no yog miscible nrog dej thiab ethanol.
YSalicylic Acid yog dab tsi?
Salicylic acid yog ib qho organic compound uas tseem ceeb heev raws li cov tshuaj uas pab tshem tawm txheej txheej ntawm daim tawv nqaij. Nws zoo nkaus li tsis muaj xim rau dawb crystalline khoom uas tsis muaj ntxhiab. Cov mis mos ntawm cov tshuaj no yog C7H6O3, thiab nws cov molar loj yog 138.12 g / mol. Lub melting point ntawm salicylic acid crystals yog 158.6 ° C, thiab decomposes ntawm 200 ° C. Cov crystals no tuaj yeem raug sublimation ntawm 76 ° C. Lub npe IUPAC ntawm salicylic acid yog 2-Hydroxybenzoic acid.
Salicylic acid yog ib qho tseem ceeb ua tshuaj kho pob txuv, dandruff, pob txuv, thiab lwm yam kab mob ntawm daim tawv nqaij vim nws muaj peev xwm tshem tawm txheej txheej ntawm daim tawv nqaij. Yog li, salicylic acid yog cov khoom tseem ceeb hauv kev tsim cov khoom siv tawv nqaij; Piv txwv li, nws muaj txiaj ntsig zoo hauv qee cov tshuaj zawv plaub hau los kho dandruff. Nws yog ib qho tseem ceeb hauv kev tsim Pepto-Bismol, tshuaj siv los kho cov kab mob plab hnyuv. Tsis tas li ntawd, salicylic acid kuj tseem siv tau ua zaub mov noj.
Qhov txawv ntawm Glycolic Lactic thiab Salicylic Acid yog dab tsi?
Qhov sib txawv tseem ceeb ntawm glycolic lactic thiab salicylic acid yog cov khoom uas muaj glycolic acid yog tsim rau cov tawv nqaij rhiab, thiab cov khoom uas muaj lactic acid yog tsim rau cov tawv nqaij qhuav thiab paub tab, whereas cov khoom uas muaj salicylic acid yog haum rau pob txuv. daim tawv nqaij.
Cov hauv qab no qhia txog qhov sib txawv ntawm glycolic lactic thiab salicylic acid nyob rau hauv daim ntawv tabular rau ib sab ntawm kev sib piv.
Summary - Glycolic Lactic vs Salicylic Acid
Qhov sib txawv tseem ceeb ntawm glycolic lactic thiab salicylic acid yog cov khoom uas muaj glycolic acid yog tsim rau cov tawv nqaij rhiab, thiab cov khoom uas muaj lactic acid yog tsim rau cov tawv nqaij qhuav thiab paub tab, whereas cov khoom uas muaj salicylic acid yog haum rau pob txuv. daim tawv nqaij.
