Nome: lactic acid; 2-hydroxypropanoic acid
* IUPAC
Numero CAS: 50-21-5
Formula chimica: C₃H₆O₃ or CH₃CH(OH)COOH
Massa molare: 90.07794 g
Percentuale di massa: C 40.001 %; H 6.7137 %; O 53.285 % 
isomeri:  2-methoxyacetic acid  •  1,3-dihydroxyacetone

• biologico • acido carbossilico

• "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

doppi legami: 1
tripli legami: 0
Sigma Bonds: 11
pi Bonds: 1
Totale: 12
carboxyl Gruppi: 1
gruppi idrossilici: 1
ibridazione: double bonded carbon and oxygen are sp2; all other carbons and oxygens are sp3

Wikipedia

(1) - Taber's Cyclopedic Medical Dictionary, 18th ed.; F. A. David Company: Philadelphia, PA, 1997; p 22.