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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 .
Hazards NFPA 704 (fire diamond) 1. 0. 0. Lethal dose or concentration (LD, LC): ... (III) oxide with acetic anhydride: Sb 2 O 3 + 3 C 4 H 6 O 3 → 2 Sb(CH 3 CO 2) 3 ...
"NFPA 704: Standard System for the Identification of the Hazards of Materials for Emergency Response" is a standard maintained by the U.S.-based National Fire Protection Association. First "tentatively adopted as a guide" in 1960, [ 1 ] and revised several times since then, it defines the " Safety Square " or " Fire Diamond " which is used to ...
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
Hazard statements. H226, H301, H302, ... At one time acetic anhydride was prepared by the reaction of ketene with acetic acid: [5]
Hazards [4] NFPA 704 (fire diamond) 1. 1. 0. ... by treatment of aspartic acid with a mixture of formic acid and acetic anhydride. [54] ...
From gas stoves and cleaning products, a growing body of research shows that there are potential health hazards lurking in your home — and they disproportionately affect women.
In the laboratory, it can be easily synthesized from anthranilic acid and acetic anhydride. N-Acetylanthranilic acid exhibits triboluminescence when crushed. [5] The fractured crystals have large electrical potentials between areas of high and low charge.
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