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Merck

91204

Supelco

Acetic anhydride

for GC derivatization, LiChropur, ≥99.0%

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About This Item

Fórmula lineal:
(CH3CO)2O
Número de CAS:
Peso molecular:
102.09
Beilstein/REAXYS Number:
385737
EC Number:
MDL number:
UNSPSC Code:
12000000
PubChem Substance ID:
NACRES:
NA.22

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grade

for GC derivatization

Quality Level

vapor density

3.5 (vs air)

vapor pressure

10 mmHg ( 36 °C)
4 mmHg ( 20 °C)

assay

≥99.0% (GC)
≥99.0%

form

liquid

autoignition temp.

629 °F

quality

LiChropur

expl. lim.

10.3 %

reaction suitability

reagent type: derivatization reagent
reaction type: Acylations

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Este artículo
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assay

≥99.0% (GC)

assay

≥99% (GC)

assay

≥99%

assay

≥98.0%

Quality Level

100

Quality Level

-

Quality Level

200

Quality Level

200

form

liquid

form

-

form

liquid

form

liquid

solubility

H2O: slightly soluble

solubility

-

solubility

water: slightly soluble

solubility

H2O: slightly soluble

bp

138-140 °C (lit.)

bp

138-140 °C (lit.)

bp

138-140 °C (lit.)

bp

138-140 °C (lit.)

General description

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.

Application

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.

Other Notes

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).

Legal Information

LiChropur is a trademark of Merck KGaA, Darmstadt, Germany

signalword

Danger

Hazard Classifications

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

Storage Class

3 - Flammable liquids

wgk_germany

WGK 1

flash_point_f

120.2 °F - closed cup

flash_point_c

49 °C - closed cup

ppe

Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter


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