A yellow coal-tar dyestuff which probably consists chiefly of rosolic acid.
We now know that a diazo-salt is first formed under these circumstances, and that the decomposition of this unstable compound in the presence of water gives rise to the rosolic acid.
It is evident, from what has been said, that rosolic acid and its related colouring-matters are members of the triphenylmethane group.
Later researches have shown that by heating rosolic acid with ammonia it is converted into rosaniline.
It was observed by Runge in 1834 that crude carbolic acid, on treatment with lime, gave a red, acid colouring-matter which he separated and named "rosolic acid.
In fact they obtained rosolic acid from magenta by the action of nitrous acid on the latter.
The close analogy between magenta and rosolic acid was further shown by Caro in 1866.
Boettger recommends the linen stuffs to be dipped into an alcoholic solution of rosolic acid, then into a concentration solution of sodium carbonate, and finally washed with water.
This dye is formed when rosolic acid and ammonia are heated to between 248 deg.
Rosolic acid and coralline, as well as eosine, are turned by hydrochloric acid to an orange-yellow: the two former are distinguished from eosine by their shade, which inclines to a yellow.
Potassa turns rosolic acid and coralline from an orange-red to a bright red, while it produces no change in eosine.
Without previously washing in water treat the film with three or four successive applications of corallin (Rosolic acid) solution.
Prepare tube cultivations in nutrient bouillon tinted with litmus, rosolic acid, neutral red, and incubate.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "rosolic" in a variety of sentences. We hope that you will now be able to make sentences using this word.
