Definitions
from The Century Dictionary.
- Related to rosaniline.
from the GNU version of the Collaborative International Dictionary of English.
- adjective (Chem.) Pertaining to, or designating, a complex red dyestuff (called
rosolic acid ) which is analogous to rosaniline and aurin. It is produced by oxidizing a mixture of phenol and cresol, as a dark red amorphous mass, C20H16O3, which forms weak salts with bases, and stable ones with acids. Called alsomethyl aurin , and, formerly,corallin .
Etymologies
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Examples
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The fourth group comprises saffranine, azo-dinaphthyldiamine, rosolic acid, coralline, pure eosine and cosine modified by a salt of lead, coccina, artificial ponceau, and red-wood.
Scientific American Supplement, No. 363, December 16, 1882 Various
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Weigh out rosolic acid (corallin), 0.5 gramme, and dissolve it in 80 per cent. alcohol, 100 c.c. Keep this as a stock solution.
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Pasteur's solution, 191 peptone rosolic acid water, 186 water (Dunham), 177 plaster-of-Paris discs, 192 potato, 174 gelatine (Elsner), 204
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Potassa turns rosolic acid and coralline from an orange-red to a bright red, while it produces no change in eosine.
Scientific American Supplement, No. 363, December 16, 1882 Various
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Prepare tube cultivations in nutrient bouillon tinted with litmus, rosolic acid, neutral red, and incubate.
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To 10 c.c. of the milk in a test tube add 10 c.c. of alcohol and 0.3 c.c. of a 1 per cent. alcoholic solution of rosolic acid.
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Peptone rosolic acid water, 186 water (Dunham), preparation of, 177
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Measure out peptone water (Dunham), 100 c.c., and rosolic acid solution, 2 c.c., and mix.
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They might thus be confounded with the dyes of the fourth group, i.e., rosolic acid, coralline, eosine, and coccine.
Scientific American Supplement, No. 363, December 16, 1882 Various
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a few drops of rosolic acid solution as indicator, and the flask placed in a boiling water-bath and continually agitated.
The Handbook of Soap Manufacture H. A. Appleton
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