Crossword-Solution: ANTHRAQUINONE
Dictionary
| Word | Word Type | Definition |
|---|---|---|
| Anthraquinone | n. | A hydrocarbon, C6H4.C2O2.C6H4, subliming in shining yellow needles. It is obtained by oxidation of anthracene. |
We have 1 clue for the answer “ANTHRAQUINONE”
| Clue | Answers |
|---|---|
| a chemical used in the manufacture of some dyes | 1 answer |
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Section of a curve
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Hint 1 meaning
The apparent arc described, above or below the horizon, by the
sun or other celestial body. The diurnal arc is described during the
daytime, the nocturnal arc during the night.
Hint 2 anagram
ACR
Hint 3 another clue
AID WHEN GOING TO COURT
28 +1
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Sentences with ANTHRAQUINONE (5)
Anthraquinone heated with sulphuric acid and treated with formaldehyde in the usual manner, yields a substance which, when mixed with water, forms an opaque, milky solution.
Vapour baths of iron are used in connexion with boiling anthracene (335°), anthraquinone (368°), sulphur (444°), phosphoruspentasulphide (518°); molten lead may also be used.
The quinone is purified, converted into a sulpho-acid, and the sodium salt of the latter on fusion with alkali gives alizarin, which is dihydroxy-anthraquinone.
Isomeric compounds known as "flavopurpurin" and "anthrapurpurin" are also made from the disulpho-acids of anthraquinone by fusion with alkali and potassium chlorate.
Another trihydroxy-anthraquinone, although not obtained directly from anthracene, must be claimed as a tar-product.