Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Trichloroethanoic acid

Dichloroethanoic acid, CHCljCOOH. Low-melting solid, m.p. 5-6 "C, b.p. 194°C. Prepared by the action of copper powder on trichloroethanoic acid or by the action of sodium cyanide on chloral hydrate. [Pg.94]

Trichloroethanoic acid, CCI3COOH. A crystalline solid which rapidly absorbs water vapour m.p. 58°C, b.p. 196-5" C. Manufactured by the action of chlorine on ethanoic acid at 160°C in the presence of red phosphorus, sulphur or iodine. It is decomposed into chloroform and carbon dioxide by boiling water. It is a much stronger acid than either the mono- or the dichloro-acids and has been used to extract alkaloids and ascorbic acid from plant and animal tissues. It is a precipitant for proteins and may be used to test for the presence of albumin in urine. The sodium salt is used as a selective weedkiller. [Pg.94]

They are colourless liquids with characteristic odours, and are prepared by the condensation of ketones with alkyl orthoformates in the presence of alcohols, or by the reaction of acetylenes with alcohols in presence of HgO and BF3. In some cases trichloroethanoic acid is used as the catalyst. They lose alcohol when heated and form vinyl ethers. Exchange of alcohol groups occurs when the ketals of the lower alcohols are boiled with alcohols of greater molecular weight. See acetals. [Pg.230]

Statistically, we find fewer ethanoate anions than trichloroethanoate anions in the respective solutions of the two acids. And if there are fewer ethanoate anions in solution per mole of ethanoic acid, then there will be fewer solvated protons. In other words, the extent to which ethanoic acid dissociates is less than the corresponding extent for trichloroethanoic acid. I is a weak acid and VIII is strong dipping a simple pH electrode into a solution of each of the two acids rapidly demonstrates this truth. [Pg.261]

Question. Trichloroethanoic acid is readily decarboxylated in aqueous solution CCl3COOH(aq) -> CHCl3(aq) + C02(g)... [Pg.77]

TRICHLORO-l, 1-ETHANEDIOL see CDOOOO TRICHLOROETHANOIC ACID see TII250 TRICHLOROETHENE see TIO750 TRICHLOROETHENYLSILANE see TIN750 TRI-(2-CHLOROETHYL)AMINE HYDROCHLORIDE seeTNF500... [Pg.1918]

Why is the value of for trichloroethanoic acid more than 10000 times larger than that for ethanoic acid ... [Pg.261]

The decomposition of CHCI3 to COClj has been noted as a result of exposure to a gas flame [1529]. Trichloromethane oxidation is also considered to be responsible for the generation of phosgene following the addition of trichloroethanoic acid in flame photometric procedures [1219] ... [Pg.138]

Trichloroacetic acid (Figure 12.5), also known as trichloroethanoic acid and trichloromethane carboxylic acid, comes in the form of colorless or white crystals and has a distinctive sharp, pungent odor. As far as its toxicity is... [Pg.81]

TRICHLOROETHANOIC ACID SOLUTION (76-03-9) CjHCljOj Combustible liquid [flash point (solid material) >230°F/>110°C]. Generally stable if moisture is not present in elevated tenperatures, this material, combined with... [Pg.1028]

C1CH2,C02H (2.87), and CH3CO2H (4.76). Trichloroethanoic acid is the strongest acid as its conjugate base (the carboxylate ion) is stabilised by the inductive effect created by three electronegative chlorine atoms. As the number of chlorine atoms decrease, the inductive effect also decreases. [Pg.279]

Synonyms Aceto-caustin TCA Trichloracetic acid Trichloroacetic acid, solution Trichloroethanoic acid... [Pg.4484]

Chloroacetic acid (chloroethanoic acid), CH2CICOOH Dichloroacetic acid (dichloroethanoic acid), CHCI2COOH Trichloroacetic acid (trichloroethanoic acid), CCI3COOH... [Pg.79]

Trichloroacetic acid (also known as trichloroethanoic acid) is an analogue of acetic acid in which the three hydrogen atoms of the methyl group have all been replaced by chlorine atoms. [Pg.90]

TCA is also called trichloroethanoic acid. It is obtained through distillation of the product from nitric acid steam on chloral acid. It is found as anhydrous (very hygroscopic), white crystals. [Pg.13]

Xia, CF Xing, DY Chen, BR. Study of chloroethanoic and trichloroethanoic acid thermodynamics with cross-linked chitosan resin. Ion Exchang and Aasorption, 2004, 20(2), 125-130. [Pg.1359]

See other pages where Trichloroethanoic acid is mentioned: [Pg.83]    [Pg.404]    [Pg.261]    [Pg.690]    [Pg.799]    [Pg.89]    [Pg.285]    [Pg.634]    [Pg.1024]    [Pg.314]    [Pg.291]    [Pg.63]    [Pg.278]    [Pg.1033]    [Pg.1048]    [Pg.4488]    [Pg.832]    [Pg.283]    [Pg.285]    [Pg.1042]    [Pg.669]    [Pg.404]    [Pg.404]    [Pg.1014]    [Pg.49]    [Pg.214]   
See also in sourсe #XX -- [ Pg.566 , Pg.792 ]

See also in sourсe #XX -- [ Pg.1024 ]

See also in sourсe #XX -- [ Pg.821 ]



SEARCH



© 2024 chempedia.info