Search results
Results from the WOW.Com Content Network
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 .
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.
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.
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 ...
Generally, however, these guidelines agree that highly processed foods contain high amounts of total and added sugars, fats, and/or salt, low amounts of dietary fiber, use industrial ingredients ...
The worldwide production of acetic anhydride is a major application, and uses approximately 25% to 30% of the global production of acetic acid. The main process involves dehydration of acetic acid to give ketene at 700–750 °C. Ketene is thereafter reacted with acetic acid to obtain the anhydride: [50] CH 3 CO 2 H → CH 2 =C=O + H 2 O
For premium support please call: 800-290-4726 more ways to reach us
A common type of organic acid anhydride is a carboxylic anhydride, where the parent acid is a carboxylic acid, the formula of the anhydride being (RC(O)) 2 O. Symmetrical acid anhydrides of this type are named by replacing the word acid in the name of the parent carboxylic acid by the word anhydride. [2] Thus, (CH 3 CO) 2 O is called acetic ...