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Sigma-Aldrich

Acetic anhydride

for synthesis

Synonym(e):

Acetanhydrid

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1 L
CHF 47.40
2.5 L
CHF 91.90
25 L
CHF 377.00

About This Item

Lineare Formel:
(CH3CO)2O
CAS-Nummer:
108-24-7
Molekulargewicht:
102.09
MDL-Nummer:
MFCD00008705
UNSPSC-Code:
12352106
EG-Index-Nummer:
203-564-8
NACRES:
NA.22

CHF 47.40

Voraussichtliches Versanddatum28. Mai 2025

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Qualität

for synthesis
synthesis grade

Qualitätsniveau

200

Dampfdruck

4 hPa ( 20 °C)

Assay

≥98.0% (GC)

Form

liquid

Selbstzündungstemp.

330 °C

Wirksamkeit

630 mg/kg LD50, oral (Rat)
4320 mg/kg LD50, skin (Rabbit)

Expl.-Gr.

2.0-10.2 % (v/v)

pH-Wert

3 (20 °C, 10 g/L in H2O)

mp (Schmelzpunkt)

-73 °C

Übergangstemp.

flash point 49 °C

Dichte

1.08 g/cm3 at 20 °C

Lagertemp.

2-30°C

SMILES String

O(C(=O)C)C(=O)C

InChI

1S/C4H6O3/c1-3(5)7-4(2)6/h1-2H3

InChIKey

WFDIJRYMOXRFFG-UHFFFAOYSA-N

Allgemeine Beschreibung

Acetic anhydride is a widely used reagent in organic synthesis. The reagent is effective for acetylating alcohols, amines, and thiols. Additionally, it is used in various named reactions such as the Pummerer reaction, the Perkin reaction, the Polonovski reaction, the N-oxide reaction, and the Thiele reaction. Acetic anhydride is an effective reagent during oxidation of alcohols, dehydration, ether cleavage, enol acetate formation, and gem-diacetate formation.[1]

Anwendung

Acetic anhydride is used:
  • In the solvent free acylation of 2-methylfuran to 2-acetyl-5-methylfuran in presence of hydroxide fluorides catalyst.[2]
  • As a catalyst in the synthesis of 3-arylideneisobenzofuran-1(3H)-one derivatives from phthalic anhydride and quinoline derivatives.
  • In the preparation of hyperbranched poly ethoxy siloxanes by condensation reaction with tetra ethoxy silane in presence of an organotitanium catalyst.[3]

Hinweis zur Analyse

Gehalt (GC, Fl.%): ≥ 98.0 % (a/a)
Dichte (d 20 °C/ 4 °C): 1.080 - 1.082
Identität (IR): entspricht

Signalwort

Danger

Gefahreneinstufungen

Acute Tox. 2 Inhalation - Acute Tox. 4 Oral - Eye Dam. 1 - Flam. Liq. 3 - Skin Corr. 1B

Lagerklassenschlüssel

3 - Flammable liquids

WGK

WGK 1

Flammpunkt (°F)

120.2 °F - closed cup

Flammpunkt (°C)

49 °C - closed cup

Analysenzertifikate (COA)

Suchen Sie nach Analysenzertifikate (COA), indem Sie die Lot-/Chargennummer des Produkts eingeben. Lot- und Chargennummern sind auf dem Produktetikett hinter den Wörtern ‘Lot’ oder ‘Batch’ (Lot oder Charge) zu finden.

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Inorganic hydroxide fluorides as solid catalysts for acylation of 2-methylfuran by acetic anhydride
Frouri F, et al.
Applied Catalysis. B, Environmental, 168, 515-523 (2015)
Acetic Anhydride
Regina Zibuck
Encyclopedia of Reagents for Organic Synthesis, Second Edition (2001)
One-pot synthesis of hyperbranched polyethoxysiloxanes
Zhu X, et al.
Macromolecules, 39(5), 1701-1708 (2016)

Questions

1–2 of 2 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

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