A Dictionary of the Coal Tar Colours
A Dictionary of the Coal Tar Colours
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Is known as Alizarine YCA (BRITISH ALIZAR- INE COMPANY), Alizarine G (BADISCHE), Alizarine SDG (MEISTER), Alizarine X (BAYER), Alizarine FA (LEVERKUS). See ALIZARINE. Fluorescein r R /CO. C (i H 3 . OH. \ ^ fiil <\ COC G H ;t OH. / is the base of the Eosin dyes. It is pre- pared by heating resoycin with phthalic anhydride to 200' J C. , and may therefore be called Resorcin Phthalein, and is analo- gous to phenol phthalein. It forms dark brown crystals, insoluble in water, but soluble in weak alkaline solutions to a red solution, which, when dilute, has a splendid yellowish green fluorescence. So- luble in alcohol, the solution has a green fluorescence. Dyes wool and silk yellow, and the shades have a faint fluorescence, but it has little tinctorial value, its dyeing power being weak, and the shades fugi- tive. Fluorescein Blue (SOCY. CHEM. IND. , BASLE. ) C 18 H 8 Br 6 N 2 5 NH 4 obtained by treating in potassium carbon- ate solution Diazoresorufin with Bromine, and precipitating with an acid.
What to read after A Dictionary of the Coal Tar Colours?
You can find similar books in the "Read Also" column, or choose other free books by George H George Henry Hurst to read online
To quickly assess the difficulty of the text, read a short excerpt:
Is known as Alizarine YCA (BRITISH ALIZAR- INE COMPANY), Alizarine G (BADISCHE), Alizarine SDG (MEISTER), Alizarine X (BAYER), Alizarine FA (LEVERKUS). See ALIZARINE. Fluorescein r R /CO. C (i H 3 . OH. \ ^ fiil <\ COC G H ;t OH. / is the base of the Eosin dyes. It is pre- pared by heating resoycin with phthalic anhydride to 200' J C. , and may therefore be called Resorcin Phthalein, and is analo- gous to phenol phthalein. It forms dark brown crystals, insoluble in water, but soluble in weak alkaline solutions to a red solution, which, when dilute, has a splendid yellowish green fluorescence. So- luble in alcohol, the solution has a green fluorescence. Dyes wool and silk yellow, and the shades have a faint fluorescence, but it has little tinctorial value, its dyeing power being weak, and the shades fugi- tive. Fluorescein Blue (SOCY. CHEM. IND. , BASLE. ) C 18 H 8 Br 6 N 2 5 NH 4 obtained by treating in potassium carbon- ate solution Diazoresorufin with Bromine, and precipitating with an acid.
What to read after A Dictionary of the Coal Tar Colours?
You can find similar books in the "Read Also" column, or choose other free books by George H George Henry Hurst to read online
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