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Substance Name: Lactic acid [USP:JAN]
RN: 50-21-5
UNII: 3B8D35Y7S4
InChIKey: JVTAAEKCZFNVCJ-UHFFFAOYSA-N

Note

  • A normal intermediate in the fermentation (oxidation, metabolism) of sugar. The concentrated form is used internally to prevent gastrointestinal fermentation. (From Stedman, 26th ed).

Molecular Formula

  • C3-H6-O3

Molecular Weight

  • 90.0774
 

Classification Codes

  • Agricultural Chemical
  • Growth Regulator / Fertilizer
  • Mutation Data
  • Pharmaceutic Necessity for Sodium Lactate (Injection)
  • Plant Growth Regulator
  • Skin / Eye Irritant
  • Tumor Data

Names and Synonyms

Name of Substance

  • 2-Hydroxypropanoic acid
  • 2-Hydroxypropionic acid
  • DL-Lactic acid
  • Lactic acid [USP:JAN]
  • Lactic acid, dl-
  • Propanoic acid, 2-hydroxy-

MeSH Heading

  • Lactic acid

Synonyms

  • (RS)-2-Hydroxypropionsaeure
  • 1-Hydroxyethanecarboxylic acid
  • 2-Hydroxypropanoic acid
  • 2-Hydroxypropionic acid
  • Acidum lacticum
  • Aethylidenmilchsaeure
  • AI3-03130
  • alpha-Hydroxypropionic acid
  • BRN 5238667
  • CCRIS 2951
  • Cheongin haejanghwan
  • Cheongin haewoohwan
  • Cheongin samrakhan
  • DL-Lactic acid
  • DL-Milchsaeure
  • EC 200-018-0
  • EINECS 200-018-0
  • EINECS 209-954-4
  • EPA Pesticide Chemical Code 128929
  • Ethylidenelactic acid
  • FEMA No. 2611
  • FEMA Number 2611
  • HSDB 800
  • Kyselina 2-hydroxypropanova
  • Kyselina 2-hydroxypropanova [Czech]
  • Kyselina mlecna
  • Kyselina mlecna [Czech]
  • Lactate
  • Lactic acid
  • Lactic acid (natural)
  • Lactic acid USP
  • Lacticum acidum
  • Lactovagan
  • Milchsaeure
  • Milchsaure [German]
  • Milk acid
  • NSC 367919
  • Ordinary lactic acid
  • Propanoic acid, 2-hydroxy-
  • Propel
  • Propionic acid, 2-hydroxy-
  • Racemic lactic acid
  • SY-83
  • Tonsillosan
  • UNII-3B8D35Y7S4

Systematic Names

  • Lactic acid
  • Propanoic acid, 2-hydroxy-

Superlist Names

  • (+-)-2-Hydroxypropanoic acid
  • DL-Lactic acid
  • Lactic acid

Registry Numbers

CAS Registry Number

  • 50-21-5

FDA UNII

  • 3B8D35Y7S4

Other Registry Numbers

  • 1334714-39-4
  • 152-36-3
  • 598-82-3

System Generated Number

  • 0000050215

Structure Descriptors

InChI

InChI=1S/C3H6O3/c1-2(4)3(5)6/h2,4H,1H3,(H,5,6)

InChIKey

JVTAAEKCZFNVCJ-UHFFFAOYSA-N

Smiles

CC(O)C(=O)O

Toxicity

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
guinea pig LD50 oral 1810mg/kg (1810mg/kg)   Journal of Industrial Hygiene and Toxicology. Vol. 23, Pg. 259, 1941.
mouse LD50 oral 4875mg/kg (4875mg/kg)   FAO Nutrition Meetings Report Series. Vol. 40, Pg. 144, 1967.
quail LD50 oral > 2250mg/kg (2250mg/kg)   Farm Chemicals Handbook. Vol. -, Pg. C252, 1991.
rabbit LD50 skin > 2gm/kg (2000mg/kg)   Farm Chemicals Handbook. Vol. -, Pg. C252, 1991.
rabbit LDLo oral 5gm/kg (5000mg/kg)   Industrial and Engineering Chemistry. Vol. 15, Pg. 628, 1923.
rabbit LDLo rectal 600mg/kg (600mg/kg)   Comptes Rendus des Seances de la Societe de Biologie et de Ses Filiales. Vol. 83, Pg. 136, 1920.
rat LD50 oral 3543mg/kg (3543mg/kg)   Farm Chemicals Handbook. Vol. -, Pg. C252, 1991.

Physical Properties

Physical Property Value Units Temp (deg C) Source
Melting Point 16.8 deg C   EXP
pKa Dissociation Constant 3.86 (none) 20 EXP
log P (octanol-water) -0.72 (none)   EXP
Water Solubility 1.00E+06 mg/L   EXP
Vapor Pressure 0.0813 mm Hg 25 EXP
Henry's Law Constant 1.13E-07 atm-m3/mole 25 EST
Atmospheric OH Rate Constant 5.92E-12 cm3/molecule-sec 25 EST

Physical property data is provided to ChemIDplus by SRC, Inc.