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EC / List no.: 203-564-8
CAS no.: 108-24-7
Mol. formula: C4H6O3
Acetic anhydride, or ethanoic anhydride, is the chemical compound with the formula (CH3CO)2O.
Commonly abbreviated Ac2O, it is the simplest isolable anhydride of a carboxylic acid and is widely used as a reagent in organic synthesis.
Acetic Anhydride is a colorless liquid that smells strongly of acetic acid, which is formed by its reaction with moisture in the air.
Structure and properties
Acetic anhydride, like most acid anhydrides, is a flexible molecule with a nonplanar structure.
The pi system linkage through the central oxygen offers very weak resonance stabilization compared to the dipole-dipole repulsion between the two carbonyl oxygens.
The energy barriers to bond rotation between each of the optimal aplanar conformations are quite low.
Like most acid anhydrides, the carbonyl carbon atom of acetic anhydride has electrophilic character, as the leaving group is carboxylate.
The internal asymmetry may contribute to acetic anhydride's potent electrophilicity as the asymmetric geometry makes one side of a carbonyl carbon atom more reactive than the other, and in doing so tends to consolidate the electropositivity of a carbonyl carbon atom to one side (see electron density diagram).
Production
Acetic anhydride was first synthesized in 1852 by the French chemist Charles Frédéric Gerhardt (1816-1856) by heating potassium acetate with benzoyl chloride.
Acetic anhydride is produced by carbonylation of methyl acetate:
CH3CO2CH3 + CO → (CH3CO)2O
The Tennessee Eastman acetic anhydride process involves the conversion of methyl acetate to methyl iodide and an acetate salt.
Carbonylation of the methyl iodide in turn affords acetyl iodide, which reacts with acetate salts or acetic acid to give the product. Rhodium chloride in the presence of lithium iodide is employed as catalysts.
Because acetic anhydride is not stable in water, the conversion is conducted under anhydrous conditions.
To a decreasing extent, acetic anhydride is also prepared by the reaction of ketene (ethenone) with acetic acid at 45–55 °C and low pressure (0.05–0.2 bar).
H2C=C=O + CH3COOH → (CH3CO)2O (ΔH = −63 kJ/mol)
The route from acetic acid to acetic anhydride via ketene was developed by Wacker Chemie in 1922, when the demand for acetic anhydride increased due to the production of cellulose acetate.
Due to its low cost, acetic anhydride is usually purchased, not prepared, for use in research laboratories.
Reactions
Acetic anhydride is a versatile reagent for acetylations, the introduction of acetyl groups to organic substrates.
In these conversions, acetic anhydride is viewed as a source of CH3CO+.
Acetylation of alcohols and amines
Alcohols and amines are readily acetylated.
For example, the reaction of acetic anhydride with ethanol yields ethyl acetate:
(CH3CO)2O + CH3CH2OH → CH3CO2CH2CH3 + CH3COOH
Often a base such as pyridine is added to function as catalyst.
In specialized applications, Lewis acidic scandium salts have also proven effective catalysts.
Acetylation of aromatic rings
Aromatic rings are acetylated by acetic anhydride. Usually acid catalysts are used to accelerate the reaction.
Illustrative are the conversions of benzene to acetophenone and ferrocene to acetylferrocene:
(C5H5)2Fe + (CH3CO)2O → (C5H5)Fe(C5H4COCH3) + CH3CO2H
Preparation of other acid anhydrides
Dicarboxylic acids are converted to the anhydrides upon treatment with acetic anhydride.
Acetic Anhydride is also used for the preparation of mixed anhydrides such as that with nitric acid, acetyl nitrate.
Precursor to geminal diacetates
Aldehydes react with acetic anhydride in the presence of an acidic catalyst to give geminal diacetates.
A former industrial route to vinyl acetate involved the intermediate ethylidene diacetate, the geminal diacetate obtained from acetaldehyde and acetic anhydride:
CH3CHO + (CH3CO)2O → (CH3CO2)2CHCH3
Hydrolysis
Acetic anhydride dissolves in water to approximately 2.6% by weight.
Aqueous solutions have limited stability because, like most acid anhydrides, acetic anhydride hydrolyses to give carboxylic acids.
In this case, acetic acid is formed, this reaction product being fully water miscible:
(CH3CO)2O + H2O → 2 CH3CO2H
Applications
As indicated by its organic chemistry, acetic anhydride is mainly used for acetylations leading to commercially significant materials.
Its largest application is for the conversion of cellulose to cellulose acetate, which is a component of photographic film and other coated materials, and is used in the manufacture of cigarette filters.
Similarly it is used in the production of aspirin (acetylsalicylic acid), which is prepared by the acetylation of salicylic acid.
Acetic Anhydride is also used as an active modification agent via autoclave impregnation and subsequent acetylation to make a durable and long-lasting timber.
In starch industry, acetic anhydride is a common acetylation compound, used for the production of modified starches (E1414, E1420, E1422)
Legal status
Because of its use for the synthesis of heroin by the diacetylation of morphine, acetic anhydride is listed as a U.S. DEA List II precursor, and restricted in many other countries.
Manufacture of acetyl compounds, cellulose acetates. As acetulizer and solvent in examining wool fat, glycerol, fatty and volatile oils, resins; detection of rosin.
Widely used in organic synthesis, e.g., as dehydrating agent in nitrations, sulfonations and other reactions where removal of water is necessary.
In preparation of anhydrous acetic acid in nonaqueous titrimetry.
Cellulose acetate fibers and plastics; vinyl acetate; dehydrating and acetylating agent in production of pharmaceuticals, dyes, perfumes, explosives.
Esterifying agent for food starch (5% max).
Industry Uses
• Adhesives and sealant chemicals
• Distributors repackage and sell this chemical to variety of small scale chemical manufacturers
• Intermediates
• Solvents (which become part of product formulation or mixture)
• Used as a drying agent during a reaction
• Viscosity adjustors
Consumer Uses
• Adhesives and sealants
• Agricultural products (non-pesticidal)
• Chemical intermediate.
• Paper products
• Personal care products
Uses at Household & Commercial/Institutional Products
• Home Maintenance
• Inside the Home
Methods of Manufacturing
Acetic anhydride can be obtained directly by liquid-phase oxidation of acetaldehyde.
The peracetic acid formed from oxygen and acetaldehyde reacts under suitable conditions with a second molecule of acetaldehyde to form acetic anhydride and water.
Rapid removal of the reaction water and the use of suitable catalysts are essential in this process.
Mixtures of acetic acid and acetic anhydride are always obtained, their ratio can be varied within wide limits by changing the reaction conditions. Generally, the highest possible anhydride yield is sought.
General Manufacturing Information
Industry Processing Sectors
• All other basic organic chemical manufacturing
• Electrical equipment, appliance, and component manufacturing
• Explosives manufacturing
• Pesticide, fertilizer, and other agricultural chemical manufacturing
• Wholesale and retail trade
General description
Acetic anhydride is a carboxylic acid anhydride commonly used for the acetylation of amines and alcohols.
Acetic Anhydride undergoes exothermic reaction on addition of water to form acetic acid.
The photodecomposition of acetic anhydride has been studied over the temperature range from 60-160°C.
The impact of treating pine wood with acetic anhydride has been investigated to evaluate the toughness of pine wood.
Application
Acetic anhydride has been used in the preparation of 6-dimethylamino-2,3-naphthalenedicarboxylic anhydride.
Acetic Anhydride has also been used to generate acetate ions during high resolution chemical ionization mass spectrometry (CI-ToFMS) analysis.
Acetic anhydride (chemical formula: (CH3CO)2O) is the simplest isolable anhydride of a carboxylic acid, is widely used as a reagent in organic synthesis.
Acetic Anhydride has an internal asymmetric structure, leading to its potent electrophilicity.
In organic chemistry, it is mainly used in acetylation for the manufacture of commercially significant materials, e.g.
Acetic Anhydride can be used for the conversion of cellulose to cellulose acetate and aspirin.
Acetic Anhydride can also be used as a wood preservative. In starch industry, it is a common acetylation compound for acetylation of monoglyceride.
Acetic Anhydride is also an esterification agent for the production of modified starches.
Acetic Anhydride is produced by carbonylation of methyl acetate or the reaction between ketene and acetic acid.
Acetic anhydride is a colourless liquid and appreciably soluble in water.
Acetic Anhydride is of ethanoic acid smell. Acetic acid anhydride is flammable, moisture sensitive, and incompatible with strong oxidising agents, water, strong bases, alcohols, metals, reducing agents, amines, ammonia, nitrates, nitric acid, permanganates, phenols, sodium hydroxide, hydrogen peroxide, chromium trioxide, potassium hydroxide, perchloric acid, and ethanol.
Acetic anhydride is mainly used for the acetylation of cellulose to cellulose acetate for photographic film and other applications.
Upon burning, acetic anhydride decomposes and produces toxic gases and toxic fumes including acetic acid fumes.
Acetic Anhydride attacks many metals with or without the presence of water.
Acetic anhydride is a combustible, colorless, strongly refractive, liquid which has a strongly irritating odor.
Acetic anhydride, or ethanoic anhydride, is the chemical compound with the formula (CH3CO)2O.
Commonly abbreviated Ac2O, it is the simplest isolatable acid anhydride and is a widely used reagent in organic synthesis.
Acetic Anhydride is a colorless liquid that smells strongly of acetic acid, formed by its reaction with the moisture in the air.
Formic anhydride is an even simpler acid anhydride, but it spontaneously decomposes, especially once removed from solution.
An esterification agent used in the preparation of modified starch and for acetylation of acetylated monoglycerides.
Acetic Anhydride has a strong acetic odor.
Colorless, very mobile liquid with a very strong, acetic acid-like odor.
Experimentally determined detection and recognition odor threshold concentrations were <600 μg/m3 (<140 ppbv) and 1.5 mg/m3 (360 ppbv), respectively.
Uses:
Acetic anhydride is an important solvent and acetylation agent.
Acetic Anhydride is used for the manufacture of acetylcellulose, acetylsalicylic acid, acetanilide, nitrofurane, sulfonamides, vitamin B6 etc. Product Data Sheet
Preparation of anhydrous acetic acid in nonaqueous titrimetry.
Manufacture of acetyl compounds, cellulose acetates.
As acetulizer and solvent in examining wool fat, glycerol, fatty and volatile oils, resins, detection of rosin.
Widely used in organic syntheses, e.g., as dehydrating agent in nitrations, sulfonations and other reactions where removal of water is necessary.
Acetic Anhydride is an esterifier for food starch, also used in combi- nation with adipic anhydride.
Production Methods
Acetic anhydride is produced by carbonylation of methyl acetate :
CH3CO2CH3 + CO → (CH3CO)2O
This process involves the conversion of methyl acetate to methyl iodide and an acetate salt.
Carbonylation of the methyl iodide in turn affords acetyl iodide, which reacts with acetate salts or acetic acid to give the product.
Rhodium iodide and lithium iodide are employed as catalysts.
Because acetic anhydride is not stable in water, the conversion is conducted under anhydrous conditions.
In contrast, the Monsanto acetic acid process, which also involves a rhodium catalyzed carbonylation of methyl iodide, is at least partially aqueous.
To a decreasing extent, acetic anhydride is also prepared by the reaction of ethenone (ketene) with acetic acid at 45–55 °C and low pressure (0.05–0.2 bar).
H2C= C= O + CH3COOH → (CH3CO)2O (ΔH = ?63 kJ/mol)
Ketene is generated by dehydrating acetic acid at 700–750 °C in the presence of triethyl phosphate as a catalyst or (in Switzerland and the CIS) by the thermolysis of acetone at 600–700 °C in the presence of carbon disulfide as a catalyst.
CH3COOH H2C= C= O + H2O (ΔH = +147 kJ/mol)
CH3COCH3 → H2C= C= O + CH4
The route from acetic acid to acetic anhydride via ketene was developed by Wacker Chemie in 1922, when the demand for acetic anhydride increased due to the production of cellulose acetate.
Due to its low cost, acetic anhydride is purchased, not prepared, for use in research laboratories.
Application
As indicated by its organic chemistry, Ac2O is mainly used for acetylations leading to commercially significant materials.
Its largest application is for the conversion of cellulose to cellulose acetate, which is a component of photographic film and other coated materials.
Similarly it is used in the production of aspirin (acetylsalicylic acid), which is prepared by the acetylation of salicylic acid.
Acetic Anhydride is also used as a wood preservative via autoclave impregnation to make a longer lasting timber.
In starch industry, acetic anydride is a common acetylation compound, used for the production of modified starches
Because of its use for the synthesis of heroin by the diacetylation of morphine, acetic anhydride is listed as a U.S. DEA List II precursor, and restricted in many other countries.
A clear colorless liquid with a strong odor of vinegar. Flash point 129°F.
Corrosive to metals and tissue.
Density 9.0 lb /gal.
Manufacture of cellulose esters, plastics, pharmaceuticals, photographic films, cigarette filters, and magnetic tape, inorganic synthesis as an acetylating agent, bleaching agent, and dehydrating agent.
Purification Methods
Adequate purification can usually be achieved by fractional distillation through an efficient column.
Acetic acid can be removed by prior refluxing with CaC2 or with coarse Mg filings at 80-90o for 5days, or by distillation from a large excess of quinoline (1% AcOH in quinoline) at 75mm pressure.
Acetic anhydride can also be dried by standing with Na wire for up to a week, removing the Na and distilling it under vacuum.
(Na reacts vigorously with acetic anhydride at 65-70o).
Dippy & Evans [J Org Chem 15 451 1950] let the anhydride (500g) stand over P2O5 (50g) for 3hours, then decanted it and stood it with ignited K2CO3 for a further 3hours.
The supernatant liquid was distilled and the fraction b 136-138o was further dried with P2O5 for 12hours, followed by shaking with ignited K2CO3, before two further distillations through a five-section Young and Thomas fractionating column.
The final material distilled at 137.8-138.0o.
Acetic Anhydride can also be purified by azeotropic distillation with toluene: the azeotrope boils at 100.6o.
After removal of the remaining toluene, the anhydride is distilled [sample had a specific conductivity of 5 x 10-9 ohm-1cm -1].
Rapid procedure: Shake with P2O5, separate, shake with dry K2CO3 and fractionally distil.
Density: 1.087g/mL
Color: Colorless
Assay Percent Range: 99+%
Infrared Spectrum: Authentic
Linear Formula: (CH3CO)2O
Beilstein: 02, 166
Packaging: Glass bottle
Fieser: 01,3; 02,7; 05,3; 06,1; 07,1; 08,1; 09,1; 11,1; 12,1; 13,93; 14,150; 15,1
Merck Index: 15, 55
Refractive Index: 1.3890 to 1.3910 (20°C, 589nm)
Quantity: 1L
Formula Weight: 102.09
Physical Form: Liquid
Percent Purity: ≥99.0%
Chemical Name or Material: Acetic anhydride, 99+%
Applications/uses
• Adhesives/sealants-B&C
• Agriculture intermediates
• Architectural coatings
• Artifical sweetener
• Consumer electronics
• Cosmetic and personal care intermediate
• Dyes / pigments / paints
• Electronic chemicals
• Electronic connectors
• Food and beverage intermediates
• Food flavors & food fragrances
• Fungicides int
• General industrial coatings
• Herbicides - intermediate for glyphosate
• Herbicides - intermediate for other
• HTF - fine chemicals
• Intermediates
• Janitorial & household cleaners
• Other-food chemicals
• Pharmaceutical chemicals
• Polymer & plastic
• Process additives
• Process solvents
• Soap/detergents
• Starting material
• Upholstery
• Water treatment industrial
• Wire wrappers
• Wire/cable
Acetic anhydride is the chemical compound with the formula (CH3CO)2O.
Commonly abbreviated Ac2O, it is one of the simplest acid anhydrides and is a widely used reagent in organic synthesis.
Acetic Anhydride is a colorless liquid that smells strongly of acetic acid, which is formed by its reaction with the moisture in the air.
Production
Acetic anhydride is produced by carbonylation of methyl acetate:
CH3CO2CH3 + CO → (CH3CO)2O
This process involves the conversion of methyl acetate to methyl iodide and an acetate salt.
Carbonylation of the methyl iodide in turn affords acetyl iodide, which reacts with acetate salts or acetic acid to give the product.
Rhodium and lithium iodides are employed as catalysts.
Because acetic anhydride is not stable in water, the conversion is conducted under anhydrous conditions.
In contrast, the Monsanto acetic acid synthesis, which also involves a rhodium catalyzed carbonylation of methyl iodide, is at least partially aqueous.
To a decreasing extent, acetic anhydride is also prepared by the reaction of ketene with acetic acid.
Ketene is generated by dehydrating acetic acid at elevated temperatures.
Due to its low cost, acetic anhydride is purchased, not prepared, for use in research laboratories.
Uses
Ac2O is mainly used for the acetylation of cellulose to cellulose acetate for photographic film and other applications.
In general alcohols and amines are acetylated.
For example, the reaction of acetic anhydride with ethanol is:
(CH3CO)2O + CH3CH2OH → CH3CO2CH2CH3 + CH3CO2H
Often a base such as pyridine is added to function as catalyst.
Lewis acidic scandium salts are also effective catalysts.
Aspirin, acetyl salicylic acid, is prepared by the acetylation of salicylic acid using acetic anhydride.
Because of its use for the synthesis of heroin by the diacetylation of morphine, acetic anhydride (known as 'AA' in clandestine chemistry circles) is listed as a DEA List II Precursor, and restricted in many other countries.
Hydrolysis
Acetic anhydride dissolves in water to approximately 2.6% by weight.
Aqueous solutions have limited stability because, like most acid anhydrides, acetic anhydride hydrolyses to give acetic acid:
(CH3CO)2O + H2O → 2 CH3CO2H
Acetic Anhydride is a clear liquid with a pungent, penetrating vinegar-like odor.
Acetic Anhydride is completely miscible with diethyl ether and can be easily dissolved in the usual organic solvents.
Acetic Anhydride also reacts with alcohols and is an excellent solvent for numerous organic and inorganic products.
Why Acetic Anhydride?
A major benefit of using acetic anhydride is its acetylation ability of cellulose properties which is needed to produce acetate fibers, plastics, coatings, and films.
Acetic Anhydride is especially valuable for the direct esterification of alcohol where acetic acid cannot be used.
Another large use for acetic anhydride is in the manufacture of acetylsalicylic acid (aspirin), acetylcholine hydrochloride, acetophenacetin, sulfonamides, aceto-p-aminophenol, cortisone, acetanilide, theophylline, sulfa drugs, certain vitamins, and hormones, and many other pharmaceuticals and pharmaceutical intermediates.
These corrosion data are mainly based on results of general corrosion laboratory tests, carried out with pure chemicals and water solutions nearly saturated with air (the corrosion rate can be quite different if the solution is free from oxygen).
All concentrations are given in weight-% and the solvent is water if nothing else is shown.
The corrosion data apply to annealed materials with normal microstructure and clean surfaces, throughout.
A colorless transparent liquid with a strong sour taste, the vapor of which is a tear gas.
Acetic Anhydride is miscible with chloroform, benzene and ether. Soluble in water.
Mixed with water to produce acetic acid.
Dissolved in ethanol, ethyl acetate.
Flammable, its vapor and air can form an explosive mixture, in the case of open flame, high heat energy caused by combustion explosion.
A chemical reaction may occur in contact with a strong oxidizing agent.
anhydrous sodium acetate reacts with acetyl chloride. In order to avoid boiling of the reactants, the reaction needs to be cooled with water, and the crude product is obtained after the reaction is completed.
Sodium acetate was added to the obtained crude product and fractionated with a fractionating column to collect a fraction at 135 to 140 ° C.
To obtain acetic anhydride.
Alcohols, primary and secondary aromatic amines were examined.
Used in organic synthesis, dyes, pharmaceutical industry and the manufacture of acetyl compounds.
About Acetic Anhydride
Helpful information
Acetic Anhydride is registered under the REACH Regulation and is manufactured in and / or imported to the European Economic Area, at ≥ 100 000 tonnes per annum.
Acetic Anhydride is used in articles, by professional workers (widespread uses), in formulation or re-packing, at industrial sites and in manufacturing.
Consumer Uses
ECHA has no public registered data indicating whether or in which chemical products the substance might be used. ECHA has no public registered data on the routes by which Acetic Anhydride is most likely to be released to the environment.
Article service life
Other release to the environment of Acetic Anhydride is likely to occur from: outdoor use in long-life materials with low release rate (e.g. metal, wooden and plastic construction and building materials) and indoor use in long-life materials with low release rate (e.g. flooring, furniture, toys, construction materials, curtains, foot-wear, leather products, paper and cardboard products, electronic equipment).
Acetic Anhydride can be found in products with material based on: wood (e.g. floors, furniture, toys) and wood used for large surface area articles (e.g. construction and building materials for floors, claddings).
Widespread uses by professional workers
Acetic Anhydride is used in the following products: laboratory chemicals and pH regulators and water treatment products. Acetic Anhydride is used in the following areas: scientific research and development and health services. Acetic Anhydride is used for the manufacture of: chemicals and rubber products. Other release to the environment of Acetic Anhydride is likely to occur from: indoor use (e.g. machine wash liquids/detergents, automotive care products, paints and coating or adhesives, fragrances and air fresheners).
Formulation or re-packing
Acetic Anhydride is used in the following products: laboratory chemicals.
Acetic Anhydride has an industrial use resulting in manufacture of another substance (use of intermediates).
Release to the environment of Acetic Anhydride can occur from industrial use: formulation of mixtures, formulation in materials, manufacturing of the substance, in processing aids at industrial sites, in the production of articles, as an intermediate step in further manufacturing of another substance (use of intermediates), as processing aid, for thermoplastic manufacture, as processing aid and of substances in closed systems with minimal release.
Uses at industrial sites
Acetic Anhydride is used in the following products: laboratory chemicals, fuels, oil and gas exploration or production products and pharmaceuticals.
Acetic Anhydride has an industrial use resulting in manufacture of another substance (use of intermediates).
Acetic Anhydride is used for the manufacture of: chemicals.
Release to the environment of Acetic Anhydride can occur from industrial use: in processing aids at industrial sites, as an intermediate step in further manufacturing of another substance (use of intermediates), as processing aid, for thermoplastic manufacture, manufacturing of the substance, in the production of articles, as processing aid and of substances in closed systems with minimal release.
Manufacture
Release to the environment of Acetic Anhydride can occur from industrial use: manufacturing of the substance, as an intermediate step in further manufacturing of another substance (use of intermediates), in processing aids at industrial sites, formulation of mixtures, formulation in materials, in the production of articles, as processing aid, for thermoplastic manufacture, as processing aid and of substances in closed systems with minimal release.
IUPAC NAMES:
AcetanhydridEssigsäureanhydridRD_CLP_108-24-7_ACETIC ACID, ANHYDRIDE_V1_20180111_TS
Acetic Acid Anhydride
Acetic acid anhydride
acetic acid anhydride
Acetic acid, anhydride
ACETIC ANHYDRIDE
Acetic Anhydride
Acetic anhydride
acetic anhydride
Acetic Anhydride
Acetic anhydride
acetic anhydride
acetyl acetate
Acetyl acetate, Acetyl oxide
ES-Anhydrid
Essigsäureanhydrid
NC_CS_495_50446_acetic anhydride_108-24-7
SYNONYMS:
ACETIC ANHYDRIDE
Acetyl acetate
108-24-7
Acetanhydride
Acetyl anhydride
Ethanoic anhydride
Acetic oxide
Acetyl oxide
Acetic acid, anhydride
Acetyl ether
acetic acid anhydride
Anhydride acetique
Anidride acetica
Octowy bezwodnik
Azijnzuuranhydride
Essigsaeureanhydrid
Ethanoic anhydrate
Anhydrid kyseliny octove
Ac2O
(CH3CO)2O
HSDB 233
UNII-2E48G1QI9Q
Acetic acid, 1,1'-anhydride
2E48G1QI9Q
CHEBI:36610
Octowy bezwodnik [Polish]
Azijnzuuranhydride [Dutch]
ethanoyl ethanoate
Anidride acetica [Italian]
Anhydride acetique [French]
Essigsaeureanhydrid [German]
Anhydrid kyseliny octove [Czech]
EINECS 203-564-8
EPA Pesticide Chemical Code 044007
acetanhydrid
acetic anhydrid
actic anhydride
diacetyl oxide
acetic-anhydride
acetic, anhydride
AcOAc
Acetyltrimethyl-Silane
acetic acetic anhydride
Acetic anhydride [UN1715] [Corrosive]
acetic acid acetyl ester
CAPPING REAGENT A
Acetyl ether Acetyl oxide
(MeCO)2O
DSSTox_CID_4395
SCHEMBL523
Acetic anhydride ACS grade
EC 203-564-8
acetic acid-acetic anhydride
(Ac)2O
Acetic anhydride, >=99%
Acetic anhydride, 99.5%
Acetic Anhydride Reagent ACS
4-02-00-00386 (Beilstein Handbook Reference)
Acetic anhydride, JIS special grade
Acetic anhydride, reagent grade, >=98%
CAS-108-24-7
Acetic anhydride [UN1715] [Corrosive]
Acetic anhydride, ACS reagent, >=98.0%
Acetic anhydride, ReagentPlus(R), >=99%
Acetic anhydride, p.a., ACS reagent, 97.0%
Acetic anhydride, SAJ first grade, >=93.0%
Acetic anhydride, Lonza quality, >=99.5% (GC)
Acetic anhydride, for GC derivatization, >=99.0%
Acetic anhydride, p.a., ACS reagent, reag. ISO, reag. Ph. Eur., 99.0%
Acetic anhydride, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., >=99% (GC)
Acetic Anhydride (Controlled Chemical)
Cap A (acetic anhydride 10% in THF/lutidine 8 : 1)
Cap A (acetic anhydride 12% in acetonitrile)
ACETICACIDPHENYL-METHYLESTER
Acetic anhydride, ACS, 97+%
Acetic Anhydride (ca. 1mol/L in Dichloromethane)
Cap A (acetic anhydride 12% in acetonitrile),Acetic anhydride solution
Cap A (acetic anhydride 10% in THF),Acetic anhydride solution
Cap A (acetic anhydride 10% in THF/pyridine 8 : 1),Acetic anhydride solution
ACETIC ANHYDRIDE/2,6-LUTIDINE/THF FOR ABI
Acetic anhydride, extra pure
Acetic anhydride, reagent grade, ACS, ISO
Acetic anhydride, DNA synthesis grade
aceticacidanhydride
Acetyl acetate
Acetyl anhydride
Acetyl ether
acetylanhydride
acetylether
Anhydrid kyseliny octove
Anhydride acetique
anhydrideacetique
anhydrideacetique(french)
anhydridkyselinyoctove
Anidride acetica
anidrideacetica
Acetic anhydride ;Acetic oxide;Acetyl oxide;Ethanoic anhydrde
Ethanoic anhydrde
acetic anhydrid
ACETIC ANHYDRIDE REAGENTPLUS(TM) 99.&
ACETIC ANHYDRIDE, 98%, A.C.S. REAGENT
ACETIC ANHYDRIDE, REAGENTPLUS, >=99%
ACETIC ANHYDRIDE, PKG. WITH 10 X 1 ML
CAP A (ACETIC ANHYDRIDE10% IN
ACETIC ANHYDRIDE, 99+%
ACETIC ANHYDRIDE R. G., REAG. ACS, REAG. ISO, REAG. PH. EUR.
ACETIC ANHYDRIDE, ACS
CAP A (ACETIC ANHYDRIDE 10% IN THF)
CAP A (ACETIC ANHYDRIDE 12% IN
AceticAnhydrideA.R.
ACETIC ANHYDRIDE, REAG.
Acetic anhydride, 98+%
Acetic anhydride, reagent ACS, 97+%
ACETIC ANHYDRIDE REAGENT, (ACS)
acetic anhydride solution
ACETICANHYDRIDE,TECHNICAL(BULK
Acetic acid anhydride Ac2O
Acetic anhydride, 97+%, ACS reagent
Acetic anhydride, 99+%, for analysis
Acetic anhydride, 99+%, pure
ACETIC ANHYDRIDE FOR ANALYSIS EMSURE
ACETIC ANHYDRIDE EXTRA PURE 1 L
ACETIC ANHYDRIDE (1,1',2,2'-13C4, 99%)
INDIGO CARMINE HIGH PURITY GRADE
AC2O
ACETYL OXIDE
ACETIC ANHYDRIDE
ACETIC OXIDE
108-24-7 [RN]
203-564-8 [EINECS]
385737 [Beilstein]
Acetic acid anhydride
Acetic anhydride [ACD/IUPAC Name]
Anhídrido acético [Spanish]
Anhydrid kyseliny octove [Czech]
anhydride acetique
Anhydride acétique [French] [ACD/IUPAC Name]
Anidride acetica [Italian]
azijnzuuranhydride [Dutch]
Essigsaeureanhydrid [German]
Essigsäureanhydrid [German] [ACD/IUPAC Name]
Ethanoic anhydride [Wiki]
ethanoyl ethanoate
MFCD00008705 [MDL number]
Octowy bezwodnik [Polish]
ossido di etanoile [Italian]
Уксусный ангидрид [Russian]
乙酸酐 [Chinese]
無水酢酸 [Japanese]
(2H3)Acetic anhydride
(CH3CO)2O
(MeCO)2O
114510-14-4 [RN]
16649-49-3 [RN]
4-02-00-00386 (Beilstein Handbook Reference) [Beilstein]
90980-78-2 [RN]
98006-45-2 [RN]
acetanhydride [Wiki]
acetic acid acetyl ester
Acetic acid, 1,1'-anhydride
Acetic acid, anhydride
Acetic Anhydride-d6
Acetic oxide
acetyl acetate
Acetyl acetate, Acetyl oxide
Acetyl ether
acetyl oxide
Acetyl Oxide,Ethanoic Anhydride, Acetic Acid
Azijnzuuranhydride
ethanoic anhydrate
