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Acetic anhydride, or ethanoic anhydride, is the chemical compound with the formula (CH 3 CO) 2 O. Commonly abbreviated Ac 2 O , it is the simplest isolable anhydride of a carboxylic acid and is widely used as a reagent in organic synthesis .
Acetic anhydride, the most commonly used chemical agent in heroin processing, is virtually irreplaceable. According to the DEA, Mexico remains the only heroin source route to heroin laboratories in Afghanistan. Authorities in Uzbekistan, Turkmenistan, Kyrgyzstan, and Kazakhstan routinely seize ton-quantity shipments of diverted acetic anhydride.
Acetylated distarch adipate (E1422) is a food additive of the thickening agent type, and more specifically a bulking agent. It is also used as a stabilizer. This is an additive belonging to the family of modified starches. This is a starch that is treated with acetic anhydride and adipic acid anhydride to resist high temperatures.
acetylated starch (INS 1420, E1420) [3] esterification with acetic anhydride; hydroxypropylated starch (INS 1440, E1440), starch ether, with propylene oxide, increasing viscosity stability; hydroxyethyl starch, with ethylene oxide; starch sodium octenyl succinate (OSA) starch (INS 1450, E1450) used as emulsifier adding hydrophobicity
Triacetin was prepared in the 19th century from glycerol and acetic acid. [13] Its synthesis from acetic anhydride and glycerol is simple and inexpensive. 3 (CH 3 CO) 2 O + 1 C 3 H 5 (OH) 3 → 1 C 3 H 5 (OCOCH 3) 3 + 3 CH 3 CO 2 H. This synthesis has been conducted with catalytic sodium hydroxide and microwave irradiation to give a 99% yield ...
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Acetyl hypochlorite is reported to be produced by the reaction of acetic anhydride and dichlorine monoxide at very low temperatures: [2]. Cl 2 O + (CH3CO) 2 O → 2CH 3 COOCl. The liquid can be distilled at reduced pressure, however it cannot be heated, as it violently decomposes at 100 °C to acetic anhydride, oxygen, and chlorine gas, and reacts with water and alcohols.
The esterification reaction of p-Chlorocresol with acetic anhydride to obtain 4-chloro-3-methylphenyl acetate. [11] Step 1: Protonation of the phenol group Acetic anhydride is a source of acetyl cation (CH 3 CO +). In the presence of a Lewis acid catalyst like sulfuric acid, the acetyl cation can react with the lone pair of electrons on the ...