Introduction
Name: lactic acid; 2-hydroxypropanoic acid
* IUPAC
CAS Number: 50-21-5
Molar Mass: 90.07794 g
Mass Percent: C 40.001 %; H 6.7137 %; O 53.285 %
Isomers: 2-methoxyacetic acid • 1,3-dihydroxyacetone
Classification
Uses/Function
• "It occurs in sour milk from fermentation of lactose, and it is formed in muscles during the anaerobic cell respirationthat occurs during strenuous exercise. It is also formed during anaerobic muscle activity when glucose cannot be changed to pyruvic acid in glycolysis. It contributes to muscle fatigue. Lactic acid milk (buttermilk or acidophilus milk) helps to prevent the growth of putrefactive bacteria in the large intestine." 1
Bonding
Double Bonds: 1
Triple Bonds: 0
Sigma Bonds: 11
Pi Bonds: 1
Total: 12
Carboxyl Groups: 1
Hydroxyl Groups: 1
Hybridization: double bonded carbon and oxygen are sp2; all other carbons and oxygens are sp3
For More Information
Sources
(1) - Taber's Cyclopedic Medical Dictionary, 18th ed.; F. A. David Company: Philadelphia, PA, 1997; p 22.