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2-Naphthol, or β-naphthol, is a fluorescent colorless (or occasionally yellow) crystalline solid with the formula C 10 H 7 OH. It is an isomer of 1-naphthol , differing by the location of the hydroxyl group on the naphthalene ring.
Acid Orange 7, also known as 2-naphthol orange is an azo dye. It is used for dyeing wool. Preparation It is ...
Acid orange 5: 13080 azo 554-73-4: Tropaeolin OOO2 Orange II 2-napththol orange Acid Orange 7: 15510 azo 633-96-5: Trypan blue: Niagara blue 3B Direct blue 14 23850 diazo 72-57-1: Tyrian purple: Phoenician red Natural violet 1 75800 natural 19201-53-7: Uranin: Fluoresceine sodium Acid yellow 73 45350 fluorone 518-47-8: Vat Blue 6 Blue K Vat ...
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Orange GGN, also known as alpha-naphthol orange, is an azo dye [1] formerly used as a food dye.It is the disodium salt of 1-(m-sulfophenylazo)-2-naphthol-6-sulfonic acid.In Europe, it was denoted by the E Number E111, but has been forbidden for use in foods since 1 January 1978. [2]
The reaction is faster at high pH. [2] Many other azo dyes have been prepared by similarly. Several procedures have been described in detail. [5] [6] [7] Naphthols are popular coupling agents. One example is the synthesis of the dye "organol brown" from aniline and 1-naphthol: Synthesis of organol brown from aniline and 1-naphthol
English: 2-naphthol orange; Orange II; Acid orange 7; Tropaeolin OOO; Colacid Orange; Persian Orange; Fenazo Orange CAS 633-96-5; C.I. 15510 Deutsch: 2-Naphtholorange; ß-Naphtholorange Date
Sudan I (also known as CI Solvent Yellow 14 or Solvent Orange R) [1] is an organic compound typically classified as an azo dye. [2] It is an orange-red solid, used to color waxes, oils, petrol, solvents, and polishes. Historically, Sudan I used to serve as a food coloring agent, notably for curry powder and chili powder.