Products Azo dyes are available as pure substances in specialized trade. The first representatives were synthesized in the 19th century. Today, they are among the most important dyes worldwide. Structure and properties Azo dyes contain the following general structural element and chromophore, which is called an azo group or azo bridge. R1 and R2 are … Azo Dyes
Products Quinoline yellow is available as a pure substance in specialized stores. Structure and properties Quinoline Yellow is a mixture of quinophthalones bearing sulfonate groups. It exists as a yellow powder and is soluble in water. Effects Quinoline yellow is a yellow dye. It is often mixed with indigotine, producing a green color. Indications for … Quinoline Yellow
Products Methylene blue (ATC V03AB17, ATC V04CG05) is commercially available in the form of eye drops (collyre bleu + naphazoline). It has been approved in many countries since 1984. In 2020, a solution for injection was registered as an antidote (methylthioninium chloride Proveblue from Bichsel). Structure and properties Methylene blue or methylthioninium chloride (C16H18ClN3S – … Methylene Blue
Products Azorubin is available in powder form at specialty stores. Structure and properties Azorubin (C20H12N2Na2O7S2, Mr = 502.4 g/mol) belongs to the azo dyes. It is a naphthalenesulfonic acid. Azorubine is produced synthetically (artificially) and exists as a sodium salt and reddish-brown crystalline powder that is soluble in water. Azorubin is structurally closely related to … Azorubin
Products Erythrosine is available as a pure substance in specialized stores. Structure and properties Erythrosine (C20H6I4Na2O5, Mr = 879.9 g/mol) is present as a disodium salt, a red, odorless powder that is soluble in water. It belongs to the xanthene dyes. Erythrosine is not an azo dye, but an iodinated fluorescein. Effects Erythrosine colors products … Erythrosine
Products Eosin, from Greek , dawn, is commercially available as an aqueous solution for application to the skin. Structure and properties As a drug, eosin is yellowish (= eosin G, eosin Y, C20H6Br4Na2O5, Mr = 691.9 g/mol), the sodium salt of tetrabromofluorescein. It is also known as eosin disodium and as tetrabromofluorescein disodium and belongs … Eosin
Products Tartrazine is available as a powder in specialized stores. Structure and properties Tartrazine (C16H9N4Na3O9S2, Mr = 534.4 g/mol) belongs to the azo dyes. It is a benzenesulfonic acid and a pyrazolone derivative present as a sodium salt. Tartrazine is an orange powder that is highly soluble in water. It is produced synthetically (artificially). It … Tartrazine
Products Betanin is found as a colorant in many processed products, such as strawberry yogurts. Structure and properties Betanin (C24H26N2O13, Mr = 550.5 g/mol) is a natural dye obtained from beet ( var. ). It is the major constituent of betanin red, a mixture of substances from beet. Betanin belongs to the betacyans. Indications for … Betanin
Products and production Gentian violet solutions are not commercially available as human medicines in many countries and must be prepared for customers in a pharmacy or drugstore. They can also order the solution from specialized suppliers (e.g., Hänseler). According to the New Formulary (NRF), the pure substance methylrosanilinium chloride PhEur should be used (see below), … Gentian Violet
Products Malachite green is commercially available as a veterinary drug. It is also known as diamond green, basic green 4, CI 42000, bitter almond oil green and Victoria green. Malachite green is not the same as the mineral malachite, a copper hydroxide carbonate. The name is derived from the green color of malachite. Structure and … Malachite Green
