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L6661

Sigma-Aldrich

Lactic acid

meets USP testing specifications

Synonym(s):

DL-Lactic acid, 2-Hydroxypropionic acid

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$159.30

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100 ML
$66.42
500 ML
$159.30

About This Item

Linear Formula:
CH3CH(OH)COOH
CAS Number:
50-21-5
Molecular Weight:
90.08
Beilstein/REAXYS Number:
1209341
EC Number:
200-018-0
MDL number:
MFCD00004520
UNSPSC Code:
12352106
PubChem Substance ID:
24896442
NACRES:
NA.25

$66.42

List Price$73.80Save 10%
Web-Only Promotion

Available to ship onApril 22, 2025Details

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agency

USP/NF
meets USP testing specifications

Quality Level

200

assay

88.0-92.0%

form

viscous liquid

refractive index

n20/D 1.425 (lit.)

pH

2

bp

122 °C/15 mmHg (lit.)

density

1.209 g/mL at 25 °C (lit.)

cation traces

heavy metals: ≤0.001%

application(s)

pharmaceutical (small molecule)

storage temp.

room temp

SMILES string

CC(O)C(O)=O

InChI

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

InChI key

JVTAAEKCZFNVCJ-UHFFFAOYSA-N

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Biochem/physiol Actions

In animals, lactic acid is a metabolic compound produced by proliferating cells and during anaerobic conditions such as strenuous exercise. Lactic acid can be oxidized back to pyruvate or converted to glucose via gluconeogenesis. Lactic acid is preferentially metabolized by neurons in several mammal species and during early brain development.

Other Notes

A concentrated solution of lactic acid is typically a mixture of lactic acid lactate and lactic acid. The concentration of this solution is approximately 90% (w/w).

pictograms

Corrosion
GHS05

signalword

Danger

hcodes

H314

Hazard Classifications

Eye Dam. 1 - Skin Corr. 1C

supp_hazards

EUH071

Storage Class

8A - Combustible corrosive hazardous materials

wgk_germany

WGK 1

flash_point_f

235.4 °F - closed cup

flash_point_c

113 °C - closed cup

ppe

Eyeshields, Gloves, type ABEK (EN14387) respirator filter

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Certificates of Analysis (COA)

Lot/Batch Number
0000426004
0000426004
MKCX2255
0000319344
0000363168

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Conversion of biomass to 1, 2-propanediol by selective catalytic hydrogenation of lactic acid over silica-supported copper.
Cortright RD, et al.
Applied Catalysis. B, Environmental, 39(4), 353-359 (2002)
A literature review of poly (lactic acid).
Garlotta D.
Journal of Polymers and the Environment, 9(2), 63-84 (2001)
Kwon et al.
Enzyme and microbial technology, 26(2-4), 209-215 (2000-02-26)
Batch fermentation studies were performed to evaluate the potentials of a complex nitrogen source, soybean, as an alternative to yeast extract for the economical production of lactic acid by Lactobacillus rhamnosus. An enzyme-hydrolysate of soybean meal, Soytone, with an adequate
Mohamed Ali Abdel-Rahman et al.
Biotechnology advances, 31(6), 877-902 (2013-04-30)
Fermentative production of optically pure lactic acid has roused interest among researchers in recent years due to its high potential for applications in a wide range of fields. More specifically, the sharp increase in manufacturing of biodegradable polylactic acid (PLA)
James Steele et al.
Current opinion in biotechnology, 24(2), 135-141 (2013-01-03)
It has been known since the 1960s that lactic acid bacteria are essential for the development of cheese flavor. In the ensuing 50 years significant research has been directed at understanding the microbiology, genetics and biochemistry of this process. This
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Chromatograms

application for HPLCapplication for HPLC

Questions

1–3 of 3 Questions  

  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

      Helpful?

  3. Hello For Lactic Acid (L6661-100ML), it says that its 90% concentrated (w/w). I'm trying to determine the molarity of the stock solution and am not sure how to proceed with this. Is this solution 0.9M because of the 90%? Any help is appreciated-Thanks!

    1 answer

    1. The molarity of this solution may be determined by applying the following formula:
      Density x w/w% x 1000 / Mw. Thus, 1.209 g/mL x 90% x 1000/ 90.08 g/mol = 12.08 M.

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