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A2388

Sigma-Aldrich

N-Acetylneuraminic acid

≥98% (HPLC), from Escherichia coli

Synonym(s):

5-Acetamido-3,5-dideoxy-D-glycero-D-galactononulosonic acid, Lactaminic acid, NAN, NANA, Sialic acid

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About This Item

Empirical Formula (Hill Notation):
C11H19NO9
CAS Number:
131-48-6
Molecular Weight:
309.27
Beilstein:
1716283
EC Number:
205-023-1
MDL number:
MFCD00006620
UNSPSC Code:
12352201
PubChem Substance ID:
24890650
NACRES:
NA.25
Pricing and availability is not currently available.

biological source

Escherichia coli

type

Type VI

Assay

≥98% (HPLC)

form

powder

optical activity

[α]20/D -34.0 to -30.0 °, c = 1% in water

technique(s)

HPLC: suitable

color

white to off-white

mp

184-186  °C

solubility

water: 50 mg/mL, clear, colorless

storage temp.

−20°C

SMILES string

O[C@@]1(O[C@@]([C@@H]([C@H](C1)O)NC(C)=O)([H])[C@@H]([C@@H](CO)O)O)C(O)=O

InChI

1S/C11H19NO9/c1-4(14)12-7-5(15)2-11(20,10(18)19)21-9(7)8(17)6(16)3-13/h5-9,13,15-17,20H,2-3H2,1H3,(H,12,14)(H,18,19)/t5-,6+,7+,8+,9+,11-/m0/s1

InChI key

SQVRNKJHWKZAKO-PFQGKNLYSA-N

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Application

N-Acetylneuraminic acid (NANA, Neu5Ac) is a major component of glycoconjugates such as glycolipids, glycoproteins and proteoglycans (sialogylcoproteins) where it confers selective binding characteristics to the glycosylated component. Neu5Ac is used to study its biochemistry, metabolism and uptake in vivo and in vitro. Neu5Ac is used in the development of nanocarriers.

Biochem/physiol Actions

Both sialic acid and neuraminic acid are loosely used to refer to conjugates of neuraminic acid. N-Acetylneuraminic acid is often found as the terminal sugar of cell surface glycoproteins. Cell surface glycoproteins have important roles in cell recognition and interaction as well as in cell adhesion. Membrane glycoproteins are also important in tumor growth and metastases.

Other Notes

To gain a comprehensive understanding of our extensive range of Monosaccharides for your research, we encourage you to visit our Carbohydrates Category page.

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H319

Hazard Classifications

Eye Irrit. 2

Storage Class Code

11 - Combustible Solids

WGK

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
0000431059
0000431059
0000427661
0000427661
0000424908

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Alexander T Baker et al.
Science advances, 5(9), eaax3567-eaax3567 (2019-09-14)
Adenoviruses are clinically important agents. They cause respiratory distress, gastroenteritis, and epidemic keratoconjunctivitis. As non-enveloped, double-stranded DNA viruses, they are easily manipulated, making them popular vectors for therapeutic applications, including vaccines. Species D adenovirus type 26 (HAdV-D26) is both a
Fiona E Fleming et al.
Journal of virology, 88(8), 4558-4571 (2014-02-07)
N-acetyl- and N-glycolylneuraminic acids (Sia) and α2β1 integrin are frequently used by rotaviruses as cellular receptors through recognition by virion spike protein VP4. The VP4 subunit VP8*, derived from Wa rotavirus, binds the internal N-acetylneuraminic acid on ganglioside GM1. Wa
Inessa Schwab et al.
Nature reviews. Immunology, 13(3), 176-189 (2013-02-16)
Intravenous immunoglobulin (IVIG) preparations comprise pooled IgG antibodies from the serum of thousands of donors and were initially used as an IgG replacement therapy in immunocompromised patients. Since the discovery, more than 30 years ago, that IVIG therapy can ameliorate
R Seppala et al.
Laboratory investigation; a journal of technical methods and pathology, 63(2), 197-203 (1990-08-01)
The renal handling of free sialic acid, a negatively charged sugar, was investigated in normal humans and in patients with impaired sialic acid metabolism or impaired renal function. A sensitive assay for sialic acid, based upon the specific degradation of
Anwar M Hashem et al.
PloS one, 8(2), e55428-e55428 (2013-02-21)
Vaccination is the most effective prophylactic method for preventing influenza. Quantification of influenza vaccine antigens is critically important before the vaccine is used for human immunization. Currently the vaccine antigen quantification relies on hemagglutinin content quantification, the key antigenic component
View All Related Papers

Questions

1–3 of 3 Questions  

  1. 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?

  2. 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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  3. I was wondering if the Sigma-Aldrich (A2388) N-Acetylneuraminic acid from Escherichia coli, ≥98%, is suitable to use in vitro on oligodendrocytes. In other words, is it sterile? Thank you in advance.

    1 answer

    1. This product has not been tested for in vivo or in vitro applications. Suitability for in vitro use will need to be validated by the end-user. The material is purified from Escherichia coli and has not tested for endotoxin. Solutions would require sterile filtration prior to adding to cultures. Alternatively, product 110138 is a synthetically produced product option. While not tested for in vitro use, it may be a better option for sensitive cell lines. It is not sterile and solutions would also required filter sterilization. See the link below to review this product:
      https://www.sigmaaldrich.com/product/mm/110138

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