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Azo dye

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Cat. No. Product Name Target Research Areas Chemical Structure
  • HY-D0236
    Congo Red
    4 Publications Verification

    		 Fluorescent Dye Others
    Congo Red is an azo dye. Congo Red (CR) binding been used as a diagnostic test for the presence of amyloid in tissue sections.
    Congo Red
  • HY-D0257
    Tartrazine
    1 Publications Verification

    Acid Yellow 23; FD&C Yellow No. 5

    		 Environmental Pollutants Fluorescent Dye Cardiovascular Disease Neurological Disease
    Tartrazine (Acid Yellow 23; FD&C Yellow No. 5) is an orally active azo acid dye, orange-yellow powder, soluble in water and turns yellow. Tartrazine is mainly used as a synthetic lemon yellow azo dye for food coloring. Tartrazine is the most stable colorant.Tartrazine induces mitochondria-mediated Apoptosis. Tartrazine can cause neurodevelopmental toxicity, cytotoxicity, and genotoxicity .
    Tartrazine
  • HY-Y0695
    Amido Black 10B

    Naphthol Blue Black

    		 Environmental Pollutants Fluorescent Dye Others
    Amido Black 10B (Naphthol Blue Black) is a highly toxic azo dye. Amido Black 10B is genotoxic and mutagenic. Amido Black 10B can cause respiratory problems. Amido Black 10B is used for amino acid dyeing .
    Amido Black 10B
  • HY-128448
    Carmoisine

    Azorubine; Acid Red 14; E122

    		 Environmental Pollutants Fluorescent Dye Inflammation/Immunology
    Carmoisine (Azorubine) is an azo dye that can be used as a food additive .
    Carmoisine
  • HY-D0256
    Direct Black 38
    2 Publications Verification

    ChlorAzol Black E; Ferristatin II disodium; C.I. 30235

    		 Biochemical Assay Reagents Others
    Direct Black 38 (Chlorazol Black E) is a benzidine-based azo dye, a substrate of Enterococcus gallinarum, and is mainly used for textile dyeing. Direct Black 38 is biodegradable after being reduced by microbial enzymes (such as Enterococcus gallinarum azoreductase), breaking the azo bonds and releasing benzidine and 4-aminobiphenyl. Direct Black 38 can be used in environmental toxicology, wastewater treatment and carcinogenicity studies, but its metabolite benzidine is listed as a human carcinogen .
    Direct Black 38
  • HY-D0193
    Ponceau 4R
    1 Publications Verification

    Acid Red 18; New Coccine

    		 Environmental Pollutants Fluorescent Dye Others
    Ponceau 4R is a synthetic colorant that can be used for food coloring. Ponceau 4R is a strawberry red azo dye that can be used in a variety of foods, usually synthesized from aromatic hydrocarbons, and is stable to light, heat, and acids .
    Ponceau 4R
  • HY-D1247
    Hydroxynaphthol Blue

    		Biochemical Assay Reagents Others
    Hydroxynaphthol Blue is an azo dye and serves as a metal indicator. Hydroxynaphthol Blue binds to specific metal ions to form stable complexes with distinct color and fluorescence properties. Hydroxynaphthol Blue is used for the visual monitoring of isothermal nucleic acid amplification results. A visible color difference appears between positive and negative nucleic acid amplification reactions, allowing result discrimination by the naked eye without opening the reaction tube .
    Hydroxynaphthol Blue
  • HY-118907
    Methyl Orange

    		Fluorescent Dye Others
    Methyl Orange is a soluble azo dye commonly used as an acid-base indicator and for staining cells and tissue sections, as well as for dyeing textiles. Methyl Orange appears red at a pH of 3.1 and changes to bright yellow as the pH increases to 4.4. Methyl Orange (500 mg/L) exhibits cytotoxicity and can cause DNA damage .
    Methyl Orange
  • HY-D0249
    Sunset Yellow FCF
    1 Publications Verification

    Orange Yellow S; Food Yellow 3; CI 15985

    		 Environmental Pollutants Fluorescent Dye Others
    Sunset Yellow FCF (Orange Yellow S) is an orange azo dye with a maximum absorption wavelength of 480 nm. Sunset Yellow FCF can be used in food, cosmetics and pharmaceuticals .
    Sunset Yellow FCF
  • HY-D0342
    Disperse Red 1

    		Fluorescent Dye Others
    Disperse Red 1, an azobenzene derivative, is an azo textile dye extensively used for dyeing polyester fabrics in textile industry .
    Disperse Red 1
  • HY-D0307A
    Amaranth

    Acid Red 27; Azorubin S; FD & C Red dye No. 2

    		 Environmental Pollutants Biochemical Assay Reagents Inflammation/Immunology
    Amaranth is an organic azo dye. Amaranth inhibits cellular immune response. Amaranth can be used as a food additive .
    Amaranth
  • HY-N1442
    Acid orange 7

    Orange II; D&C Orange NO. 4

    		 Environmental Pollutants Biochemical Assay Reagents Others
    Acid Orange 7 (Orange II; D&C Orange NO. 4) is an azo dye widely used in the textile, food and cosmetic industries. Acid Orange 7 is mainly used as a colorant by combining with fibers and other substances through azo bonds. Acid Orange 7 has a maximum absorption wavelength at 484-485 nm, and the concentration is measured using a UV-visible spectrophotometer. Acid Orange 7 is difficult to degrade and has a certain degree of toxicity. It is often used to study various sewage treatment technologies and photocatalytic degradation reactions, and to evaluate the removal effects of different treatment methods on organic pollutants .
    Acid orange 7
  • HY-135712
    Orange G

    Acid Orange GG

    		 Environmental Pollutants Biochemical Assay Reagents Others
    Orange G is an azo dye commonly found in textile wastewater and is mainly used for textile dyeing. Orange G has a coloring function and can give textiles a specific color. The stability and potential hazards of Orange G in the environment are often used to study the removal effects of various wastewater treatment technologies on difficult-to-degrade organic pollutants, especially the degradation of azo dyes. Related research focuses on how to destroy the azo bond of Orange G through chemical, physical or biological methods to achieve harmless treatment to solve the problem of textile wastewater pollution .
    Orange G
  • HY-W115738
    PAR

    		Biochemical Assay Reagents Others
    PAR is an azo dye widely used as a colorimetric reagent for metal ions. PAR forms stable chelates with different metal ions. PAR can also complex with heavy metal ions in polar organic solvents, such as ethanol .
    PAR
  • HY-128382
    Brilliant Black BN

    E 151

    		 Enterovirus Infection
    Brilliant black BN (E151) is an azo dye and a food colorant . Brilliant black BN is a promising antiviral agent against EV71 infection via inhibiting the interaction between EV71 and its cellular uncoating factor cyclophilin A. Brilliant black BN has the potential for the investigation of contagious disease .
    Brilliant Black BN
  • HY-D0202
    Arsenazo III

    		Fluorescent Dye Others
    Arsenazo III is an azo derivative of chromotropic acid, a metal chrome dye, a chelating agent, and a cation complexing agent. Arsenazo III forms stable 1:1 complexes with Ca 2+, Mg 2+, Sr 2+, Ba 2+, K +, and Na +, and its binding affinity for Ca 2+ depends on pH, alkali metal cation concentration, and buffer parameters. Arsenazo III serves as a colorimetric indicator for micromolar ionized Ca 2+ in cells .
    Arsenazo III
  • HY-W110910
    Eriochrome black T, Indicator

    		Biochemical Assay Reagents Infection
    Eriochrome black T, Indicator is a complexing agent for metal ions (e.g., Ca 2+, Mg 2+) and is used as an indicator in complexometric titrations. Eriochrome black T, Indicator forms colored complexes with metal ions through covalent coordination bonds, and indicates the endpoint of the titration by color change. Eriochrome black T, Indicator can be used as an anionic azo dye in photocatalytic degradation studies to evaluate the performance of photocatalysts. The reaction solution of Eriochrome black T, Indicator combined with Mg 2+ is initially purple. During loop-mediated isothermal amplification (LAMP), the color changes from purple to sky blue due to the consumption of Mg 2+ by the formation of magnesium pyrophosphate, indicating a positive reaction. The optimal concentration of Eriochrome black T, Indicator in LAMP is 60 μM, and the detection limit for Mycobacterium tuberculosis is 1 pg DNA/reaction .
    Eriochrome black T, Indicator
  • HY-D1379
    Azophloxine

    Acid red 1

    		 Environmental Pollutants Fluorescent Dye Others
    Azophloxine, also known as acid red 1 (AR1), is a member of synthetic red azo dye family .
    Azophloxine
  • HY-D0800
    Mordant Blue 29

    		Biochemical Assay Reagents Others
    Chromeazurol S is a compound belonging to the class of azo dyes. It is often used as an indicator in analytical chemistry to detect metal ions such as copper, nickel, and cobalt. Chromeazurol S turns from yellow to blue in the presence of metal ions, allowing them to be detected and quantified. It can be applied to a test strip or added directly to a solution for analysis.
    Mordant Blue 29
  • HY-W151206
    Hydroxy naphthol blue disodium

    		Fluorescent Dye Others
    Hydroxy naphthol blue disodium is an azo dye compound commonly used as an acid-base indicator (λmax = 650 nm). Within the pH range of 12 to 13, the indicator solution of Hydroxy naphthol blue disodium appears pale red in the presence of calcium ions and dark blue in the presence of disodium EDTA .
    Hydroxy naphthol blue disodium
  • HY-128369
    Acid Yellow 36

    Metanil Yellow

    		 Environmental Pollutants Cytochrome P450 Others
    Acid Yellow 36 (Metanil Yellow) is an azo dye and a pH indicator. Acid Yellow 36 changes its color from red at pH 1.2 to yellow at pH 2.3. Acid Yellow 36 is used in the leather, paper and textile industries. Acid Yellow 36 acts as a bifunctional inducer of specific isozymes of P-450 and cytosolic enzymes .
    Acid Yellow 36
  • HY-D0705
    Acid Yellow 9 monosodium salt

    Hydrogen 4-aminoAzobenzene-3,4'-disulphonate sodium salt

    		 Fluorescent Dye Others
    Acid Yellow 9 monosodium salt is an azo dye, degraded by Pseudomonas fluorescens as sole source of carbon, nitrogen and energy for the bacterium .
    Acid Yellow 9 monosodium salt
  • HY-D0411
    Xylene Fast Yellow 2G

    Acidyellow 17; Yellow 2G

    		 Biochemical Assay Reagents Others
    Xylene Fast Yellow 2G is a synthetic dye belonging to the class of azo dyes. It is commonly used in the textile industry to dye natural and synthetic fibers as well as in the paper and ink industries. Xylene Fast Yellow 2G produces a bright yellow color that is fade and wash resistant and can be applied to textiles by a variety of methods including dipping, padding and printing.
    Xylene Fast Yellow 2G
  • HY-42984
    BHQ-2 NHS

    		Biochemical Assay Reagents Others
    BHQ-2 NHS is a dark quencher with no native emission due to the polyaromatic-azo backbone and a terminal NHS ester. UBHQ-2 NHS has a wide and intense quenching range from 560-670 nm, which makes it useful as an acceptor in fluorescence resonance energy transfer (FRET) applications in conjunction with orange to far-red emitting dyes. The NHS ester can be applied to label the primary amines (-NH2) of proteins, amine-modified oligonucleotides, and other amine-containing molecules.
    BHQ-2 NHS
  • HY-D0929
    Orange I

    α-Naphthol Orange

    		 Fluorescent Dye Others
    Orange I (α-Naphthol Orange) is an anionic azo dye that can form a complex with Methylene blue (HY-14536) and cause fluorescence quenching. The equilibrium constant of the complex of Orange I and Methylene blue is 79900 mol -1·dm 3. Orange I can change the absorption spectrum of itself and Methylene blue .
    Orange I
  • HY-121525
    Biebrich scarlet

    Ponceau BS

    		 Biochemical Assay Reagents Others
    Biebrich scarlet is an azo organosulfur dyes.
    Biebrich scarlet
  • HY-D0228
    4-(4-Nitrophenylazo)resorcinol

    Azo Violet; Magneson I

    		 Fluorescent Dye Others
    4-(4-Nitrophenylazo)resorcinol (Azo Violet) is an azo purple dye used experimentally as a pH indicator, showing yellow when the pH value is lower than 11 and purple when the pH value is higher than 13. In slightly alkaline or alkaline environments, it also turns dark blue in the presence of magnesium salts. Azo Violet can also be used to test for the presence of ammonium ions. The color of the ammonium chloride or ammonium hydroxide solution will change depending on the concentration of azo violet used .
    4-(4-Nitrophenylazo)resorcinol
  • HY-121986
    Yellow AB

    Solvent yellow 5

    		 Fluorescent Dye Others
    Yellow AB (Solvent yellow 5) is an azo dye that can be used as food dye .
    Yellow AB
  • HY-W001952
    6-Bromo-2-naphthol

    		Fluorescent Dye Drug Intermediate Others
    6-Bromo-2-naphthol is an RTP (real-time polymerase chain reaction) probe that forms a 1:1 or 2:1 complex with β-cyclodextrin (β-CD). 6-Bromo-2-naphthol is capable of real-time monitoring of PCR reactions and quantification of specific nucleic acid sequences. RTP probes are a class of small DNA or RNA sequences labeled with fluorescent dyes and quencher molecules, which can be widely used in gene expression analysis, SNP genotyping, and pathogen detection. 6-Bromo-2-naphthol embeds into the cyclodextrin cavity through hydrophobic interactions, inhibits the oxygen quenching effect, and emits a phosphorescent signal at room temperature. 6-Bromo-2-naphthol can also be used as an intermediate for the synthesis of antibacterial azo dyes, and its derivatives show antibacterial activity against Staphylococcus aureus, Escherichia coli and other bacteria .
    6-Bromo-2-naphthol
  • HY-Y0700
    Calconcarboxylic acid

    		Fluorescent Dye Others
    Calconcarboxylic acid, an azo dye, acts as a silver-ion sensitizer to stain protein in SDS-PAGE gels. Calconcarboxylic acid increases silver binding on protein bands or spots by the formation of a silver-dye complex and also increases the reducing power o
    Calconcarboxylic acid
  • HY-D1480
    Crystal Ponceau 6R

    		Fluorescent Dye Others
    Crystal Ponceau 6R is a red azo dye. Crystal Ponceau 6R used in histology, for staining fibrin with the martius, scarlet and blue (MSB) Trichrome stain .
    Crystal Ponceau 6R
  • HY-D0485
    Fluorescent brightener 24

    		Fluorescent Dye Others
    Fluorescent brightener 24 is a stilbene-type fluorescent brightener and fading regulator .
    Fluorescent brightener 24
  • HY-118320
    Alizarine Yellow R

    Mordant orange 1

    		 Fluorescent Dye Others
    Alizarine Yellow R (Mordant orange 1), Salicylic acid derivative (HY-B0167), is an azo dye. Alizarine Yellow R is used as a pH indicator and a biological stain in chemical examinations and dyeing industries .
    Alizarine Yellow R
  • HY-D1270
    Direct Violet 1

    		SARS-CoV Infection
    Direct Violet 1, an azo dye, is a textile dye. Direct Violet 1 is also the protein-protein interaction (PPI) between the SARS-CoV-2 spike protein and ACE2 inhibitor with IC50s of 1.47-2.63 μM .
    Direct Violet 1
  • HY-W206911
    Erythrosin B sodium salt

    		Environmental Pollutants Biochemical Assay Reagents Others
    Erythrosin B sodium salt, is a synthetic azo dye commonly used as a food colorant and textile dye. It is a water-soluble compound that produces a bright red color and is often used to improve the appearance of products. Erythrosin B sodium salt is also used in the textile industry for dyeing wool, silk and leather. However, it has been linked to potentially negative health effects, such as allergic reactions and hyperactivity in children.
    Erythrosin B sodium salt
  • HY-W250148
    Solvent black 5

    Spirit nigrosine

    		 Biochemical Assay Reagents Others
    Solvent black 5 (Spirit nigrosine) is a synthetic dye belonging to the family of azo dyes. Also known as oil black or naphthol black, it is dark blue-black and has excellent solubility in organic solvents. Solvent black 5 is commonly used as a colorant in various industrial applications such as printing inks, coatings and plastics. It can also be used as an indicator dye to detect the presence of metals in solution. Furthermore, due to its high absorption and emission properties in the near-infrared region, it has been used in scientific research as a fluorescent biomarker for tissues and cells. However, Solvent black 5 has been reported to have potentially toxic effects on human health and the environment and its use is therefore regulated in some countries.
    Solvent black 5
  • HY-W127722
    Direct Red 75 tetrasodium

    		Biochemical Assay Reagents Others
    Direct Red 75 tetrasodium salt is an azo dye.
    Direct Red 75 tetrasodium
  • HY-D0307AR
    Amaranth (Standard)

    Acid Red 27 (Standard); Azorubin S (Standard); FD & C Red dye No. 2 (Standard)

    		 Fluorescent Dye Reference Standards Others
    Amaranth (Standard) is the analytical standard of Amaranth. This product is intended for research and analytical applications. Amaranth is a dark red to purple azo dye used as a food dye and cosmetics. Amaranth is an anionic dye that can be applied to natural and synthetic fibers, leather, paper, and phenol-formaldehyde resins.
    Amaranth (Standard)
  • HY-D0421
    C.I. Solvent yellow 18

    		Fluorescent Dye Others
    C.I. Solvent yellow 18 is a lipid-soluble fluorescent azo dye, which is widely used in industries such as textiles, medicine, food, cosmetics, plastics, paints, inks, photography and papermaking .
    C.I. Solvent yellow 18
  • HY-113045
    Aquacobalamin

    		Endogenous Metabolite Metabolic Disease
    Aquacobalamin is one of the major forms of vitamin B12 isolated from mammalian cells. Aquacobalamin accelerates the oxidation of azo-dye Orange II (HY-N1442) by HSO5 - in aqueous solutions. Aquacobalamin binds hydrogen peroxide reversibly to form a cobalt(III) hydroperoxo adduct with a 0.25 mM dissociation constant .
    Aquacobalamin
  • HY-D0249R
    Sunset Yellow FCF (Standard)

    Orange Yellow S (Standard); Food Yellow 3 (Standard); CI 15985 (Standard)

    		 Fluorescent Dye Reference Standards Others
    Sunset Yellow FCF (Standard) is the analytical standard of Sunset Yellow FCF. This product is intended for research and analytical applications. Sunset Yellow FCF (Orange Yellow S) is an orange azo dye with a maximum absorption wavelength of 480 nm. Sunset Yellow FCF can be used in food, cosmetics and pharmaceuticals .
    Sunset Yellow FCF (Standard)
  • HY-D2424
    Disperse Red 343

    		Fluorescent Dye Others
    Disperse Red 343 is an azo dye widely used in the textile industry for dyeing polyester fabrics .
    Disperse Red 343
  • HY-D0257R
    Tartrazine (Standard)

    Acid Yellow 23 (Standard); FD&C Yellow No. 5 (Standard)

    		 Fluorescent Dye Reference Standards Others
    Tartrazine (Standard) is the analytical standard of Tartrazine. This product is intended for research and analytical applications. Tartrazine is an azo acid dye, orange-yellow powder, soluble in water and turns yellow. It is mainly used as a synthetic lemon yellow azo dye for food coloring. It is the most stable colorant.
    Tartrazine (Standard)
  • HY-D0640
    Acid Orange 116

    		Fluorescent Dye
    Acid Orange 116 is an azo dye that can be removed from aqueous solutions by metal ions.
    Acid Orange 116
  • HY-D1173
    Acid blue 113

    		Fluorescent Dye Others
    Acid blue 113 is an azo dye whose staining effect is effectively removed by nanoscale zero-valent iron (NZVI) particles.
    Acid blue 113
  • HY-D1144
    Acid blue 260

    		Fluorescent Dye
    Acid blue 260 is an azo dye whose staining effect is effectively removed by multi-walled carbon nanotubes (MWCNTs). At 298 K, the adsorption capacity of MWCNT is 233.34 mg/g; and increases with the increase of dye concentration and temperature.
    Acid blue 260
  • HY-128448R
    Carmoisine (Standard)

    Azorubine (Standard); Acid Red 14 (Standard); E122 (Standard)

    		 Fluorescent Dye Reference Standards Inflammation/Immunology
    Carmoisine (Standard) is the analytical standard of Carmoisine. This product is intended for research and analytical applications. Carmoisine (Azorubine) is an azo dye that can be used as a food additive .
    Carmoisine (Standard)
  • HY-D0256A
    Direct Black 38 free acid

    ChlorAzol Black E free acid; Ferristatin II; C.I. 30235 free acid

    		 Biochemical Assay Reagents Others
    Direct Black 38 (Chlorazol Black E; Ferristatin II disodium) free acid is a benzidine-based azo dye, a substrate of Enterococcus gallinarum, and is mainly used for textile dyeing. Direct Black 38 free acid is biodegradable after being reduced by microbial enzymes (such as Enterococcus gallinarum azoreductase), breaking the azo bonds and releasing benzidine and 4-aminobiphenyl. Direct Black 38 free acid can be used in environmental toxicology, wastewater treatment and carcinogenicity studies, but its metabolite benzidine is listed as a human carcinogen .
    Direct Black 38 free acid
  • HY-D0236R
    Congo Red (Standard)

    		Fluorescent Dye Reference Standards Others
    Congo Red (Standard) is the analytical standard of Congo Red. This product is intended for research and analytical applications. Congo Red is an azo dye. Congo Red (CR) binding been used as a diagnostic test for the presence of amyloid in tissue sections.
    Congo Red (Standard)
  • HY-D0930
    OrangeIV

    		Fluorescent Dye Others
    Acid orange 5 is an azo dye. Acid orange 5 can be used in click chemistry .
    OrangeIV

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