91204

Acetic anhydride

for GC derivatization, LiChropur^™, ≥99.0%

• Fórmula linear: (CH₃CO)₂O
• Número CAS: 108-24-7
• Peso molecular: 102.09
• Beilstein: 385737
• Número CE: 203-564-8
• Número MDL: MFCD00008705
• Código UNSPSC: 12000000
• ID de substância PubChem: 329770002
• NACRES: NA.22

Propriedades

• grau: derivatization grade ((GC derivatization)); for GC derivatization
• Nível de qualidade: 100
• densidade de vapor: 3.5 (vs air)
• pressão de vapor: 10 mmHg ( 36 °C); 4 mmHg ( 20 °C)
• Ensaio: ≥99.0% (GC); ≥99.0%
• Formulário: liquid
• temperatura de autoignição: 629 °F
• qualidade: LiChropur^™
• Lim. expl.: 10.3 %
• adequação da reação: reagent type: derivatization reagent; reaction type: Acylations
• técnica(s): gas chromatography (GC): suitable
• resíduo de evaporação: ≤0.003%
• índice de refração: n20/D 1.390 (lit.)
• p.e.: 138-140 °C (lit.)
• pf: −73 °C (lit.)
• solubilidade: H₂O: slightly soluble
• densidade: 1.08 g/mL (lit.)
• cadeia de caracteres SMILES: CC(=O)OC(C)=O
• InChI: 1S/C4H6O3/c1-3(5)7-4(2)6/h1-2H3
• chave InChI: WFDIJRYMOXRFFG-UHFFFAOYSA-N

Descrição

Descrição geral

Acetic anhydride is an esterification agent which is corrosive to metals. It is a colourless liquid with strong vinegar-like odour. It is mostly used in making plastics, fibers, pharmaceuticals, dyes and explosives.

Acylation, an alternative to silylation, enables the conversion of compounds that comprise of active hydrogens (-OH, -SH and -NH) into esters, thioesters, and amides by the action of a carboxylic acid or derivative. The carbonyl group adjacent to the halogenated carbons favors the improvement of electron capture detector (ECD) response. Acylation has several benefits:

• It increases the stability of compounds by protecting unstable groups.
• It may render volatility on substances like carbohydrates or amino acids, that have several polar groups that they are non-volatile and generally decompose on heating.
• It allows the separations not possible with underivatized compounds.
• Compounds are detectable at very low levels with an ECD.

Acetic anhydride is a reagent utilized to form fragmentation-directing derivatives for GC/MS analysis.

Aplicação

Learn more in the Product Information

Suitable for the derivatization of acetyl, acetaminophen, alcohols, aldoses and partially methylated aldoses, aldosterone, amines, amino acids, amino sugars (in polysaccharides), amino sugar methyl glycosides, 2-amino-2-deoxyhexoses, arginyl peptides, aryl sulfate esters, bile acids, carbamates, carbohydrates, cerebrosides, cystine and cysteine (in peptides), desmethyldoxepin, 3,4-dihydroxyphenylglycol, estrogens, glycitols, hexopyranosides, hexosamines, hydroxamic acids, hydroxyamines, n-hydroxycarbamates, hydroxy steroids, inositols, 4-methoxy and 3,4-dimethoxyphenethylamine, methyl ester, methyl(methyl O-methyl-a-D-glucopyranosid)uronates, nucleosides, nucleoside bases and sugars, partially methylated pentose and hexoes, peptides, phenolalkylamines, phenylethylamines, polysaccharide constituents, postaglandins A,B and E, serotonin, sialic acids, sugars, natural sugars and tryptamine.

Outras notas

Reagent for acetic anhydride, acetyl, n-acetyl, n-acetyl-n, o-acetyl, acetate, aldononitrile acetate, aminoglycitol acetate, aryl acetate, permethyl acetyl, methyl ester, trifluoroacetyl, bis-trimethylsilyl, trimethylsilyl polyamino alcohol, and O-trimethylsilyl (TMS).

Informações legais

LiChropur is a trademark of Merck KGaA, Darmstadt, Germany

Informações de segurança

• Pictogramas: GHS02,GHS06,GHS05
• Palavra indicadora: Danger
• Frases de perigo: H226,H302,H314,H330
• Declarações de precaução: P210 - P280 - P301 + P312 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• Classificações de perigo: Acute Tox. 2 Inhalation - Acute Tox. 4 Oral - Eye Dam. 1 - Flam. Liq. 3 - Skin Corr. 1B
• Código de classe de armazenamento: 3 - Flammable liquids
• Classe de risco de água (WGK): WGK 1
• Ponto de fulgor (°F): 120.2 °F - closed cup
• Ponto de fulgor (°C): 49 °C - closed cup
• Equipamento de proteção individual: Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter