91204
Acetic anhydride
derivatization grade (GC derivatization), LiChropur™, ≥99.0%
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About This Item
Linear Formula:
(CH3CO)2O
CAS Number:
Molecular Weight:
102.09
UNSPSC Code:
41115710
NACRES:
NA.22
PubChem Substance ID:
EC Number:
203-564-8
Beilstein/REAXYS Number:
385737
MDL number:
Assay:
≥99.0% (GC), ≥99.0%
Form:
liquid
Grade:
derivatization grade (GC derivatization)
InChI key
WFDIJRYMOXRFFG-UHFFFAOYSA-N
InChI
1S/C4H6O3/c1-3(5)7-4(2)6/h1-2H3
SMILES string
CC(=O)OC(C)=O
grade
derivatization grade (GC derivatization)
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
technique(s)
gas chromatography (GC): suitable
evapn. residue
≤0.003%
refractive index
n20/D 1.390 (lit.)
bp
138-140 °C (lit.)
mp
−73 °C (lit.)
solubility
H2O: slightly soluble
density
1.08 g/mL (lit.)
Quality Level
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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:
Acetic anhydride is a reagent utilized to form fragmentation-directing derivatives for GC/MS analysis.
- 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
hcodes
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
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
Regulatory Listings
Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.
Deleterious substance
pdsc
Class I Designated Chemical Substances
prtr
Group 4: Flammable liquids + Type 2 petroleums + Hazardous rank III + Water insoluble liquid
fsl
Substances Subject to be Indicated Names
ishl_indicated
Substances Subject to be Notified Names
ishl_notified
91204-1ML-F: + 91204-BULK-F: + 91204-VAR: + 91204-BULK: + 91204-VAR-F: + 91204-10ML-F:4548173376370 + 91204-10X1ML-F:4548174007457 + 91204-25ML-F:4548173363318
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