PH indicators (5)
Staining dyes (4)
Solvent dyes (2)
Aromatic amines (1)
Cyclic compounds (1)
Fuel dyes (1)
Organic compound (1)
Organic pigments (1)
Sigma Aldrich (7)
AK Scientific (3)
Oakwood Chemical (3)
METHYL ORANGE (547-58-0)
Gold Orange · helianthine · Tropaeolin D
Congo red (573-58-0)
Congo red is an organic compound, the sodium salt of 3,3′-([1,1′-biphenyl]-4,4′-diyl)bis(4-aminonaphthalene-1-sulfonic acid. It is an azo dye. Congo red is water-soluble, yielding a red colloidal solution; its solubility is greater in organic solvents.
Methyl red (493-52-7)
methyl red, sodium salt · C.I. Acid Red 2
Methyl red (2-(N,N-dimethyl-4-aminophenyl) azobenzenecarboxylic acid), also called C.I. Acid Red 2, is an indicator dye that turns red in acidic solutions. It is an azo dye, and is a dark red crystalline powder.
Naphthol AS (92-77-3)
3-hydroxy-2-naphthanilide · naphthol AS, 14C-labeled cpd · naphthol AS, monosodium salt
Tropaeolin OO (554-73-4)
tropaeolin IV OO · tropaeolin OO, monosodium salt · 4-((4-(phenylamino)phenyl)azo)benzenesulfonic acid monosodium salt
Sudan black B (4197-25-5)
solvent black 3
Sudan Black B (C29H24N6) is a nonfluorescent, relatively thermostable lysochrome (fat-soluble dye) diazo dye used for staining of neutral triglycerides and lipids on frozen sections and some lipoproteins on paraffin sections. It has the appearance of a dark brown to black powder with maximum absorption at 596-605 nm and melting point 120–124 °C. It stains blue-black.
Metanil yellow (587-98-4)
acid yellow 36 · sodium 3-((4-anilinophenyl)azo)benzenesulfonate · metanil yellow, monosodium salt
Metanil Yellow (Acid Yellow 36) is a dye of the azo class. In analytical chemistry, it is used as a pH indicator and it has a color change from red to yellow between pH 1.2 and 2.3. Although it is an unpermitted food dye, because of its bright yellow color, Metanil Yellow has been used as an adulterant in turmeric powder, particularly in India.
Sudan Red 7B (6368-72-5)
fat red · fat red 7B · oil violet
Sudan Red 7B, also known as Solvent Red 19, Ceres Red 7B, Fat Red 7B, Hexatype carmine B, Lacquer red V3B, Oil violet, Organol bordeaux B, Sudanrot 7B, Typogen carmine, and C.I. 26050, is a red diazo dye. Chemically it is N-ethyl-1-[[p-(phenylazo)phenyl]azo]-2-naphthalenamine.
DEAB · C.I. Solvent Yellow 56 · N,N-diethyl-4-aminoazobenzene
Oil Yellow DE is a synthetic greenish-yellow azo dye which has the appearance of a reddish yellow powder. Its EINECS number is 219-616-8. Chemically it is N,N-diethyl-p-(phenylazo)aniline, C16H19N3.
Janus green B (2869-83-2)
Janus Green B is a basic dye and vital stain used in histology. It is also used to stain mitochondria supravitally, as was introduced by Leonor Michaelis in 1900. The indicator Janus Green B changes colour according to the amount of oxygen present.
Tropaeolin O (547-57-9)
AO6 dye · Acid Orange 6
Chrysoine resorcinol is a synthetic azo dye which was formerly used as a food additive. In Europe, it was banned as a food additive in 1977. In the US, it was banned in 1988.
Acid orange 24 (1320-07-6)
pinacyanol · pinacyanol chloride · quinaldine blue iodide
Triphenylmethane, or triphenyl methane, is the hydrocarbon with the formula (C6H5)3CH. This colorless solid is soluble in nonpolar organic solvents and not in water. Triphenylmethane is the basic skeleton of many synthetic dyes called triarylmethane dyes, many of them are pH indicators, and some display fluorescence.
28631-66-5 (8004-91-9, 28631-66-5)
aniline blue · water blue
Tetrabromophenol blue (4430-25-5)
Bromophenol Blue · Bromphenol Blue
Pinacyanol chloride (2768-90-3)
pinacyanol · quinaldine blue iodide · quinaldine blue tosylate