Sigma Aldrich (1)
TCI Chemicals (1)
D & C Brown no. 1 (1320-07-6, 6371-84-2)
Acid Orange 24 · AO24 dye
Reactive Blue 4 (13324-20-4)
procion blue MX-R · procion blue MX-RX · procion blue MX-R, disodium salt
Disperse Orange 1 (2581-69-3)
Disperse Orange 1 (4-anilino-4'-nitroazobenzene) is a dye of the azobenzene class. Disperse Orange 1 contains approximately 25% dye by weight, with the remaining mass consisting of NaCl and other salts. This dye is useful in conducting experiments with flash photolysis due to the isomerization effect between the trans-4A4N and cis-4A4N states that occurs during photo relaxation.
Solochrome Dark Blue (2538-85-4)
calcon · eriochrome blue black R · 3-hydroxy-4-((2-hydroxy-1-naphthalenyl)azo)-1-naphthalenesulfonic acid
Red Dye No. 2 · Amaranth Dye · FD and C Red No. 2
New coccine (2611-82-7)
E 124 · cochineal red · ponceau 4R
Disperse orange 3 (730-40-5)
Dispersion Orange 3 · Serisol Fast Orange GD · D Orange 3
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.
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.
CHLOROPHENOL RED (4430-20-0)
Chlorophenol red is an indicator dye that changes color from yellow to violet in the pH range 4.8 to 6.7. The lambda max is at 572 nm.
CARMINIC ACID (1390-65-4, 1260-17-9)
Carmine · Cochineal Dye · Natural Red 4
Carminic acid (C22H20O13) is a red glucosidal hydroxyanthrapurin that occurs naturally in some scale insects, such as the cochineal, Armenian cochineal, and Polish cochineal. The insects produce the acid as a deterrent to predators. An aluminum salt of carminic acid is the coloring agent in carmine.
Cresol red (1733-12-6)
o-cresolsulfonphthalein · Cresol red, monosodium salt
Cresol red (full name: o-cresolsulfonephthalein) is a triarylmethane dye frequently used for monitoring the pH in aquaria.
Brilliant Green cation (18198-35-1)
brilliant green · ethyl green · (4-(4-(diethylamino)-alpha-phenylbenzylidene)-2,5-cyclohexadien-1-ylidene)diethylammonium sulfate
The dye Ethyl Green ( C.I. 42590; C27H35N3ClBr is a triarylmethane dye. It is soluble in water.
Bromocresol green (76-60-8)
Bromcresol Green · Tetrabromocresolsulfonphthalein
Bromocresol green (BCG) is a dye of the triphenylmethane family (triarylmethane dyes). It belongs to a class of dyes called sulfonephthaleins. It is used as a pH indicator in applications such as growth mediums for microorganisms and titrations.