Lactic Acid

valuable

Functions: buffering,humectant,skin conditioning

CAS: 50-21-5

EC: 200-018-0

IUPAC: Propanoic acid, 2-hydroxy-

Updated: September 8, 2021

Descriptions

[GB]Lactic Acid is an organic compound with the formula CH3CH(OH)CO2H. It is a white, Water-soluble solid or clear liquid that is produced both naturally and synthetically. With a hydroxyl group adjacent to the carboxyl group, Lactic Acid is classified as an alpha hydroxy acid (AHA). In the form of its conjugate base called lactate, it plays a role in several biochemical processes. In solution, it can ionize a proton from the carboxyl group, producing the lactate ion CH3CH(OH)CO2. Compared to Acetic Acid, its pKa is 1 unit less, meaning Lactic Acid deprotonates ten times more easily than Acetic Acid does. This higher acidity is the consequence of the intramolecular Hydrogen bonding between the α-hydroxyl and the carboxylate group. Lactic Acid is chiral, consisting of two optical isomers . One is known as L-(+)-Lactic Acid or (S)-Lactic Acid and the other, its mirror image, is D-(−)-Lactic Acid or (R)-Lactic Acid. A mixture of the two in Equal amounts is called DL-Lactic Acid.

[HU]A Tejsav (más néven 2-hidroxipropánsav, laktát vagy E270) egy szerves sav, mely számos biokémiai folyamatban játszik szerepet. Legelőször egy svéd tudós, Carl Wilhelm Scheele izolálta 1780-ban. A molekula egy karboxilcsoportból és egy hidroxilcsoportból áll, így un. alfa-hidroxi savat (alpha hydroxy acid - AHA) alkotva. Oldatban lead egy protont a karboxil-csoportból, az így keletkező iont laktátnak nevezzük. CH3CH(OH)COO−. Higroszkópos, vízzel vagy etanollal könnyen elegyet képez. Királis molekula, két izomerje van. Egyiket L-(+)-Tejsavnak vagy (S)-Tejsavnak, míg ennek tükörképét D-(-)-Tejsavnak vagy (R)-Tejsavnak nevezik. Biológiai jelentősége az L-(+)-Tejsavnak van.

Chemical data

CAS:

50-21-5

EC:

200-018-0

INN:

lactic acid

Ph.Eur. name:

acidum lacticum

IUPAC:

Propanoic acid, 2-hydroxy-

NOAEL:

LOAEL:

POD:

Smiles:

CC(O)C(O)=O

CosIng synonyms:

tejsav; 2-mercapto- monoammonium salt propionic acid; 2-mercaptopropionic acid, ammonium salt; ammonium 2-mercaptopropionate; ammonium salt 2-mercaptopropionic acid; ammonium salt thiolactic acid; lactic acid, thio-, monoammonium salt; monoammonium salt lactic acid, thio-; monoammonium salt propionic acid, 2-mercapto-; propionic acid, 2-mercapto-, monoammonium salt; thio- monoammonium salt lactic acid; thiolactic acid, ammonium sal 2-mercapto- monoammonium salt propionic acid; 2-mercaptopropionic acid, ammonium salt; ammonium 2-mercaptopropionate; ammonium salt 2-mercaptopropionic acid; ammonium salt thiolactic acid; lactic acid, thio-, monoammonium salt; monoammonium salt lactic acid, thio-; monoammonium salt propionic acid, 2-mercapto-; propionic acid, 2-mercapto-, monoammonium salt; thio- monoammonium salt lactic acid; thiolactic acid, ammonium sal 2-hydroxy- calcium salt propanoic acid; 2-hydroxypropanoic acid, calcium salt; calcium 2-hydroxypropanoate; calcium salt 2-hydroxypropanoic acid; calcium salt lactic acid; calcium salt propanoic acid, 2-hydroxy-; lactic acid, calcium salt; propanoic acid, 2-hydroxy-, calcium salt; 2-hydroxypropanoic acid calcium salt; calcium lactate (1:2) ; calphosa 2-hydroxy- hexadecyl ester propanoic acid; hexadecyl ester lactic acid; hexadecyl ester propanoic acid, 2-hydroxy-; hexadecyl lactate; lactic acid, hexadecyl ester; n-hexadecyl lactate; n-hexadecyl-2-hydroxypropanoate; propanoic acid, 2-hydroxy-, hexadecyl ester; propanoic acid, 2hydroxy, hexadecyl este 2-hydroxy- dodecyl ester propanoic acid; 2-hydroxypropanoic acid, dodecyl ester; dodecyl 2-hydroxypropanoate; dodecyl ester 2-hydroxypropanoic acid; dodecyl ester lactic acid; dodecyl ester propanoic acid, 2-hydroxy-; dodecyl lactate; lactic acid, dodecyl ester; propanoic acid, 2-hydroxy-, dodecyl ester; propanoic acid, 2hydroxy, dodecyl este 2-hydroxy- 5-methyl-2- (1-methylethyl) cyclohexyl ester propanoic acid; 2-hydroxypropanoic acid, 5-methyl-2- (1-methylethyl) cyclohexyl ester; 5-methyl-2- (1-methylethyl) cyclohexyl ester 2-hydroxypropanoic acid; 5-methyl-2- (1-methylethyl) cyclohexyl ester propanoic acid, 2-hydroxy-; l-menthyl lactate; lactic acid, p-menth-3-yl ester; p-menth-3-yl ester lactic aci; e270

PubChem synonyms:

Safety & Regulation

EU Cosmetic Products Regulation and Amendments

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