Acetic anhydride
SIAL/242845 - ACS reagent, ≥98.0%
Synonym: Acetanhydride; Acetic acid anhydride; Acetyl acetate; Acetyl anhydride; Acetyl anhydride; Ethanoic anhydride
CAS Number: 108-24-7
Empirical Formula (Hill Notation): C4H6O3
Molecular Weight: 102.09
EC Number: 203-564-8
MDL Number: MFCD00008705
Linear Formula: (CH3CO)2O
Product Type: Chemical
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material. This image depicts SKU: 242845-100G.
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material. This image depicts SKU: 242845-1KG.
| anion traces | chloride (Cl-): ≤5 ppm |
| phosphate (PO43-): ≤0.001% | |
| sulfate (SO42-): ≤5 ppm | |
| assay | ≥98.0% |
| autoignition temp. | 629 °F |
| bp | 138-140 °C (lit.) |
| cation traces | Fe: ≤5 ppm |
| heavy metals: ≤2 ppm | |
| density | 1.08 g/mL (lit.) |
| evapn. residue | ≤0.003% |
| expl. lim. | 10.3 % |
| form | liquid |
| functional group | anhydride |
| ester | |
| grade | ACS reagent |
| impurities | MnO4- reducers, passes test |
| InChI | 1S/C4H6O3/c1-3(5)7-4(2)6/ |
| InChI key | WFDIJRYMOXRFFG-UHFFFAOYSA |
| mp | −73 °C (lit.) |
| Quality Level | 200  |
| refractive index | n |
| SMILES string | CC(=O)OC(C)=O |
| solubility | H2O: slightly soluble |
| vapor density | 3.5 (vs air) |
| vapor pressure | 10 mmHg ( 36 °C) |
| 4 mmHg ( 20 °C) |
| Application: | Acetic anhydride has been used as one of the reaction components in the preparation of: • 2-acetylamino-5-aminobe • 3,3′-bis(sulfonato)-4,4 • 10-acetoxy-9-nitro-octa • 9-nitro-oleic acid It may be used for acetylation of anisole over HBEA zeolite in a batch reactor. |
| General description: | Acetic anhydride is an organic solvent. On dissolution in water it undergoes solvolysis to afford acetic acid. It is widely employed for the acetylation of various alcohols. Wacher process (starting reagent + a ketene) and Knapsack process (starting reagent = acetaldehyde) have been reported for the industrial preparation of acetic anhydride. |
| Packaging: | 1, 6×1, 3 kg in glass bottle |
| Packaging: | 5, 100, 4×100 g in glass bottle |
| Symbol |    GHS02,GHS05,GHS06 |
| Signal word | Danger |
| Hazard statements | H226 - H302 - H314 - H330 |
| Precautionary statements | P210 - P280 - P301 + P312 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338 |
| Hazard Codes | C |
| Risk Statements | 10-20/22-34 |
| Safety Statements | 26-36/37/39-45 |
| RIDADR | UN 1715 3(8) / PGII |
| WGK Germany | WGK 1 |
| Flash Point(F) | 120.2 °F - closed cup |
| Flash Point(C) | 49 °C - closed cup |
| Supplemental Hazard Statements | EUH071 |
| Purity | ≥98.0% |
| bp | 138-140 °C (lit.) |
| mp | −73 °C (lit.) |
| Density | 1.08 g/mL (lit.) |
| Refractive Index | n |
| UNSPSC | 12352100 |