Product Description

Lactic acid is an organic acid. It has a molecular formula CH3CH(OH)COOH. It is white in solid state and it is miscible with water. While in liquid state (dissolved state) it is a colorless solution. Production includes both artificial synthesis as well as natural sources. Lactic acid is an alpha-hydroxy acid (AHA) due to the presence of carboxyl group adjacent to the hydroxyl group. It is used as a synthetic intermediate in many organic synthesis industries and in various biochemical industries. The conjugate base of lactic acid is called lactate.

In solution, it can ionize a proton from the carboxyl group, producing the lactate ion CH
3CH(OH)CO−
2. Compared to acetic acid, its pKa is 1 unit less, meaning lactic acid is ten times more acidic than acetic acid. 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 enantiomers. 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, or racemic lactic acid. Lactic acid is hygroscopic. dl-Lactic acid is miscible with water and with ethanol above its melting point, which is around 17 or 18 °C. d-Lactic acid and l-lactic acid have a higher melting point. Lactic acid produced by fermentation of milk is often racemic, although certain species of bacteria produce solely (R)-lactic acid. On the other hand, lactic acid produced by anaerobic respiration in animal muscles has the (S) configuration and is sometimes called "sarcolactic" acid, from the Greek "sarx" for flesh.

In animals, l-lactate is constantly produced from pyruvate via the enzyme lactate dehydrogenase (LDH) in a process of fermentation during normal metabolism and exercise. It does not increase in concentration until the rate of lactate production exceeds the rate of lactate removal, which is governed by a number of factors, including monocarboxylate transporters, concentration and isoform of LDH, and oxidative capacity of tissues. The concentration of blood lactate is usually 1–2 mM at rest, but can rise to over 20 mM during intense exertion and as high as 25 mM afterward. In addition to other biological roles, l-lactic acid is the primary endogenous agonist of hydroxycarboxylic acid receptor 1 (HCA1), which is a Gi/o-coupled G protein-coupled receptor (GPCR).

In industry, lactic acid fermentation is performed by lactic acid bacteria, which convert simple carbohydrates such as glucose, sucrose, or galactose to lactic acid. These bacteria can also grow in the mouth; the acid they produce is responsible for the tooth decay known as caries.In medicine, lactate is one of the main components of lactated Ringer's solution and Hartmann's solution. These intravenous fluids consist of sodium and potassium cations along with lactate and chloride anions in solution with distilled water, generally in concentrations isotonic with human blood. It is most commonly used for fluid resuscitation after blood loss due to trauma, surgery, or burns.

Specification and COA of   Lactic acid

NAME
LACTIC ACID 88%
STANDARDS
GB 2023-2003
 
 
QUANTITY
20MT
LOT NO.
2015102601
 
 
ITEM
PURIFIED GRADE
RESULT
 
 
APPERANCE
COLORLESS TRANSPARENT
VISCIDITY LIQUID
PASS
 
 
SMELL
NON IRRITANT,  ODORLESS
PASS
 
 
COLOR(APHA)
≤50
30
 
LACTIC PURITY,%
80-90
88.50
 
 
STEREOCHEMICAL PURITY,
 L(+), %
≥95
97.00
 
 
CHLORIDE(Cl-),  %
≤0.002
<0.002
 
SULFATE(SO4),  %
≤0.005
<0.005
 
IRON(Fe), % 
≤0.001
<0.001
 
IGNITION RESIDUE, %
≤0.1
0.08
 
ARSENIC(AS), mg/kg
≤1
<1
 
HEAVY METAL(PB), mg/kg
≤10
<10
 
CALCIUM
PASS
PASS
 
READILY CARBONISABLE SUBTANCES
PASS
PASS
 
 
SOLUBILITY IN THE ETHER
PASS
PASS
 
OXALIC, PHOSPHORIC, TARTARIC, CITRIC ACID
PASS
PASS
 
 
REDUCING SUGARS
PASS
PASS
 
 METHYL ALCOHOL, % 
≤0.2
<0.2
 
CYANIDE, mg/kg
≤5
<5
 

 
Packaging & Shipping
 Packing: 

 25kg/barrel,250kg/drum,1000kg/IBC Container

 Delivery time: within 7 days after payment or L/C 

How can I get the sample? 

Please tell the sales the quantity sample you want, and leave them your mailing address with phone No and zip code. They will work out the freight for you. 

2. Which courier I can choose? 

Fedex, UPS, DHL, TNT, EMS etc. The sales will help you to choose the best one. 

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