Baeyer's researches (commenced in 1886) on the reducedphthalic acids.
Such a series of typical compounds are the benzene dicarboxylic acids (phthalic acids), C6H4(COOH)2.
A notable example is provided by the phthaleins, which result by the condensation of phthalic anhydride with phenols.
It can also be synthesized by heating catechol withphthalic anhydride and sulphuric acid at 150 deg.
The reaction therefore which takes place between ortho-sulpho benzoic acid and resorcin from its analogy to that taking place between phthalic anhydride and resorcin may be represented thus, as shown by Baeyer in his second paper (Ann.
The close analogy in composition and structure between phthalic acid and ortho-sulpho-benzoic acid suggests the possibility of obtaining from the latter, by its action on phenols, substances analogous to the phthaleïns.
Defn: One of a series of artificial organic dyes made as condensation products of the phenols with phthalic acid, and well represented by phenol phthaleïn.
Defn: A red crystalline dyestuff, obtained by heating together pyrogallic and phthalic acids.
Phenol phthalein, a white or yellowish white crystalline substance made fromphthalic acid and phenol.
One of a series of artificial organic dyes made as condensation products of the phenols with phthalic acid, and well represented by phenol phthaleïn.
Baeyer, the eminent chemist who subsequently synthesised indigo, published the first of a series of investigations describing the compounds produced by heatingphthalic anhydride with phenols.
Resorcinol is a phenolic derivative of benzene containing two hydroxyl groups; it is therefore related to phenol in the same way that diamidobenzene is related to aniline or phthalic acid to benzoic acid.
One of the first discovered was produced by heating phthalic anhydride with an acid known as gallic acid, which occurs in vegetable galls, and in the form of tannin in many vegetable extracts which are used by the tanner.
Phthalic acid, which was discovered in 1836 by Laurent, is a product of the oxidation of many benzenoid compounds.
The phthalein formed from gallic acid and phthalic anhydride really results from the union of the latter with pyrogallol.
One of these compounds, phthalic acid, is obtained from naphthalene, and the other, resorcin or resorcinol, is prepared from benzene.
When phthalic acid is heated it loses water, and is transformed into a white, magnificently crystalline substance known asphthalic anhydride, i.
Thus the dinitronaphthol described as Manchester yellow, if heated for some time with dilute nitric acid, furnishes phthalic acid.
These discoveries necessitated the manufacture of phthalic acid and resorcinol.
One of a series of artificial organic dyes made as condensation products of the phenols with phthalic acid, and well represented by phenol phthale\'8bn.
A red crystalline dyestuff, obtained by heating together pyrogallic and phthalic acids.
An imido derivative ofphthalic acid, obtained as a white crystalline substance, C6H4.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "phthalic" in a variety of sentences. We hope that you will now be able to make sentences using this word.
