PH indicators (2)
Staining dyes (2)
Sigma Aldrich (3)
TCI Chemicals (3)
Oakwood Chemical (2)
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.
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.
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
Mordant Brown 1 (3564-15-6)
Leucomalachite green (129-73-7)
Malachite green is an organic compound that is used as a dyestuff and controversially as an antimicrobial in aquaculture. Malachite green is traditionally used as a dye for materials such as silk, leather, and paper. Despite its name the dye is not prepared from the mineral malachite, and the name just comes from the similarity of color.
Reactive Blue 4 (13324-20-4)
procion blue MX-R · procion blue MX-RX · procion blue MX-R, disodium salt
Acid red 88 (1658-56-6)
Fast Red S
Solvent Blue 36 (14233-37-5)
1,4-bis(isopropylamino)anthraquinone · Oil Blue A
Oil Blue A is a blue anthraquinone dye used for colouring certain plastics such as polystyrene and acrylic resins, as well as other materials such as petroleum and inks. It has good resistance to light.
Bromothymol blue (76-59-5)
Bromthymol Blue · Dibromothymolsulfonphthalein
Bromothymol blue (also known as bromothymol sulfone phthalein and BTB) is a pH indicator. It is mostly used in applications that require measuring substances that would have a relatively neutral pH (near 7). A common use is for measuring the presence of carbonic acid in a liquid.
Acid Blue 25 (6408-78-2)
AB25 dye · 1-amino-9,10-dihydro-9,10-dioxo-4-(phenylamino)-2-anthracenesulfonic acid · C.I. 62055