A dye is a colored substance that has an affinity to the substrate to which it is being applied.

A new approach is presented for analysis of microplastics in environmental samples, based on selective fluorescent staining using Nile Red (NR), followed by density-based extraction and filtration. The dye adsorbs onto plastic surfaces and renders them fluorescent when irradiated with blue light. Fluorescence emission is detected using simple photography through an orange filter. Image-analysis allows fluorescent particles to be identified and counted. Magnified images can be recorded and tiled to cover the whole filter area, allowing particles down to a few micrometres to be detected. The solvatochromic nature of Nile Red also offers the possibility of plastic categorisation based on surface polarity characteristics of identified particles. This article details the development of this staining method and its initial cross-validation by comparison with infrared (IR) microscopy. Microplastics of different sizes could be detected and counted in marine sediment samples. The fluorescence staining identified the same particles as those found by scanning a filter area with IR-microscopy.

Cyanine dyes can be used to quantify the amount of dsDNA within a sample. The linearity of fluorescence, as function of DNA amount of six dyes, is obtained by measuring the fluorescence intensity at the optimal excitation and emission maxima.


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GNE-371

GNE-371 is a potent and selective chemical probe for the second bromodomains of human transcription-initiation-factor TFIID subunit 1 and transcription-initiation-factor TFIID subunit 1-like, with an IC50 of 10 nM for TAF1(2).

  • CAS Number: 1926986-36-8
  • MF: C24H25N5O3
  • MW: 431.49
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

BCIP

BCIP(BCIP p-toluidine salt; X-phosphate p-toluidine salt) is an artificial chromogenic substrate used for the sensitive colorimetric detection of alkaline phosphatase activity.

  • CAS Number: 6578-06-9
  • MF: C15H15BrClN2O4P
  • MW: 433.621
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: 580.2ºC at 760 mmHg
  • Melting Point: 194-195ºC
  • Flash Point: 304.7ºC

ACRIFLAVINE

Acriflavine is a fluorescent dye for labeling high molecular weight RNA. It is also a topical antiseptic.

  • CAS Number: 8048-52-0
  • MF: C14H14ClN3
  • MW: 259.73
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: 179-181 °C
  • Flash Point: N/A

JC-1

JC-1 is a fluorescent lipophilic carbocyanine dye used to measure mitochondrial membrane potential.

  • CAS Number: 3520-43-2
  • MF: C25H27Cl4IN4
  • MW: 652.225
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Fluorescein-5-maleimide

Fluorescein-5-maleimide is a fluorescent thiol-reactive dye used to conjugate fluorescein to proteins (excitation: 494 nm, emission: 519 nm).

  • CAS Number: 75350-46-8
  • MF: C24H13NO7
  • MW: 427.362
  • Catalog: Dye Reagents
  • Density: 1.7±0.1 g/cm3
  • Boiling Point: 769.1±60.0 °C at 760 mmHg
  • Melting Point: >275ºC (dec.)
  • Flash Point: 418.9±32.9 °C

Dansyl amide

Dansyl amide is a fluorescent dye that is used in biochemistry and chemistry to label substances with the fluorescent dansyl group.

  • CAS Number: 1431-39-6
  • MF: C12H14N2O2S
  • MW: 250.317
  • Catalog: Dye Reagents
  • Density: 1.3±0.1 g/cm3
  • Boiling Point: 435.4±37.0 °C at 760 mmHg
  • Melting Point: 218-221ºC
  • Flash Point: 217.1±26.5 °C

3,3'-Dioctadecyloxacarbocyanine perchlorate

3,3′-Dioctadecyloxacarbocyanine perchlorate is a green fluorescent lipophilic tracer, which is weakly fluorescent in water but highly fluorescent and quite photostable when incorporated into membranes.

  • CAS Number: 34215-57-1
  • MF: C53H85ClN2O6
  • MW: 881.70500
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

4-Methylumbelliferyl-β-D-glucuronide hydrate

4-Methylumbelliferyl-β-D-glucuronide hydrate is a fluorogenic substrat (λex=362 nm , λem=445 nm).

  • CAS Number: 881005-91-0
  • MF: C16H18O10
  • MW: 370.30800
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

DFHBI

DFHBI is a small molecule that resembles the chromophore of green fluorescent protein (GFP). Spinach and DFHBI are essentially nonfluorescent when unbound, whereas the Spinach-DFHBI complex is brightly fluorescent both in vitro and in living cells.

  • CAS Number: 1241390-29-3
  • MF: C12H10F2N2O2
  • MW: 252.217
  • Catalog: Dye Reagents
  • Density: 1.4±0.1 g/cm3
  • Boiling Point: 326.2±52.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 151.1±30.7 °C

Furimazine

Furimazine is an imidazopyrazinone substrate. NanoLuc (Nluc) paired with Furimazine produced 2.5 million-fold brighter luminescence in mammalian cells relative to Oluc-19 with Coelenterazine.

  • CAS Number: 1374040-24-0
  • MF: C24H19N3O2
  • MW: 381.43
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Z-Gly-Gly-Arg-AMC

Z-Gly-Gly-Arg-AMC is a thrombin-specific fluorogenic substrate for testing of thrombin generation in PRP and platelet-poor plasma (PPP). Sequence: Z-Gly-Gly-Arg-AMC.

  • CAS Number: 66216-78-2
  • MF: C28H33N7O7
  • MW: 579.60400
  • Catalog: Peptides
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

DAF-FM DA

DAF-FM DA is a reagent to detect and quantify low concentrations of nitric oxide (NO); DAF-FM fluorescence can be detected by any instrument that can detect fluorescein, including flow cytometers, microscopes, fluorescent microplate readers and fluorometers.

  • CAS Number: 254109-22-3
  • MF: C25H18F2N2O7
  • MW: 496.41600
  • Catalog: Dye Reagents
  • Density: 1.56±0.1 g/cm3(Predicted)
  • Boiling Point: 695.7±55.0 °C(Predicted)
  • Melting Point: N/A
  • Flash Point: N/A

MKT 077

MKT-077 is a rhodacyanine dye and also a heat shock protein 70 (Hsp70) inhibitor which exhibits significant antitumor activity.

  • CAS Number: 147366-41-4
  • MF: C21H22ClN3OS2
  • MW: 432.00200
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

3,6-dichlorobenzene-1,2,4-tricarboxylic acid

3,6-Dichlorotrimellitic acid is the key precursor that is used for preparing a variety of dichlorinated fluoresceins and rhodamines such as TET and HEX. These chlorinated fluoresceins and rhodamines are widely used for labeling oligos and in DNA sequencing.

  • CAS Number: 137071-78-4
  • MF: C9H4Cl2O6
  • MW: 279.03000
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Dihydrofluorescein diacetate

Dihydrofluorescein diacetate is a fluorimetric probe mainly used for oxidative stress measurements, in both cell-free systems and cellular models.

  • CAS Number: 35340-49-9
  • MF: C24H18O7
  • MW: 418.39600
  • Catalog: Dye Reagents
  • Density: 1.353g/cm3
  • Boiling Point: 554.3ºC at 760 mmHg
  • Melting Point: 213-215ºC(lit.)
  • Flash Point: N/A

Fluorescein di(β-D-galactopyranoside)

Fluorescein di(β-D-galactopyranoside) is a fluorogenic substrate for β-galactosidase (λex=485 nm, λem=535 nm).

  • CAS Number: 17817-20-8
  • MF: C32H32O15
  • MW: 656.58700
  • Catalog: Dye Reagents
  • Density: 1.74 g/cm3
  • Boiling Point: 974.8ºC at 760 mmHg
  • Melting Point: 200-203ºC (dec.)
  • Flash Point: 316.5ºC

Ampliflu Red

ADHP is a fluorogenic peroxidase substrate (λex=530 nm, λem=590 nm).

  • CAS Number: 119171-73-2
  • MF: C14H11NO4
  • MW: 257.241
  • Catalog: Dye Reagents
  • Density: 1.5±0.1 g/cm3
  • Boiling Point: 618.6±55.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 327.9±31.5 °C

Ponceau 4R

Ponceau 4R is a synthetic colourant that may be used as a food colouring. onceau 4R is a strawberry red azo dye which can be used in a variety of food products, and is usually synthesized fromaromatic hydrocarbons; it is stable to light, heat, and acid but fades in the presence of ascorbic acid.

  • CAS Number: 2611-82-7
  • MF: C20H11N2Na3O10S3
  • MW: 604.473
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

5-Carboxyfluorescein Diacetate

5-CFDA(5-Carboxyfluorescein diacetate) is membrane-permeant and can be loaded into cells via incubation; hydrolyzed by intracellular esterases to 5-carboxyfluorescein; used for labeling human intervertebral disk cells in vitro for fluorescence microscopy.

  • CAS Number: 79955-27-4
  • MF: C25H16O9
  • MW: 460.389
  • Catalog: Dye Reagents
  • Density: 1.6±0.1 g/cm3
  • Boiling Point: 693.1±55.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 241.9±25.0 °C

Diphenylterazine

Diphenylterazine is a bioluminescence agent.

  • CAS Number: 344940-63-2
  • MF: C25H19N3O
  • MW: 377.44
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Direct Blue 14

Diphenyl Blue (Direct Blue 14) is used as reference dye for group of azo dye.

  • CAS Number: 72-57-1
  • MF: C34H24N6Na4O14S4
  • MW: 960.805
  • Catalog: Dye Reagents
  • Density: 1.007 g/mL at 20 °C
  • Boiling Point: N/A
  • Melting Point: >300 °C(lit.)
  • Flash Point: N/A

4,7-Dichloro-1,3-dihydro-1,3-dioxo-5-isobenzofurancarboxylic acid

3,6-Dichlorotrimellitic anhydride is the key precursor that is used for preparing a variety of dichlorinated fluoresceins and rhodamines such as TET and HEX. These chlorinated fluoresceins and rhodamines are widely used for labeling oligos and in DNA sequencing.

  • CAS Number: 81742-10-1
  • MF: C9H2Cl2O5
  • MW: 261.01500
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Methylene Blue

Methylene blue(Basic Blue 9) is used as a dye in chromoendoscopy, and is sprayed onto the mucosa of the gastrointestinal tract in order to identify dysplasia, or pre-cancerous lesions.

  • CAS Number: 61-73-4
  • MF: C16H18ClN3S
  • MW: 319.85200
  • Catalog: Dye Reagents
  • Density: 1.0 g/mL at 20 °C
  • Boiling Point: N/A
  • Melting Point: 190 °C (dec.)(lit.)
  • Flash Point: 45 °C

ortho-iodoHoechst 33258

Hoechst stains are part of a family of blue fluorescent dyes used to stain DNA. Hoechst 33258 is a cell dye for DNA quantitation.IC50 Value:These Bis-benzimides were originally developed by Hoechst AG, which numbered all their compounds so that the dye Hoechst 33342 is the 33342nd compound made by the company. There are three related Hoechst stains: Hoechst 33258, Hoechst 33342, and Hoechst 34580. The dyes Hoechst 33258 and Hoechst 33342 are the ones most commonly used and they have similarexcitation/emission spectra. Both dyes are excited by ultraviolet light at around 350 nm, and both emit blue/cyan fluorescent light around anemission maximum at 461 nm. Unbound dye has its maximum fluorescence emission in the 510-540 nm range. Hoechst dyes are soluble in water and in organic solvents such as dimethyl formamide or dimethyl sulfoxide. Concentrations can be achieved of up to 10 mg/mL. Aqueous solutions are stable at 2-6 °C for at least six months when protected from light. For long-term storage the solutions are instead frozen at ≤-20 °C.The dyes bind to the minor groove of double-stranded DNA with a preference for sequences rich in adenine andthymine. Although the dyes can bind to all nucleic acids, AT-rich double-stranded DNA strands enhance fluorescence considerably.Hoechst dyes are cell-permeable and can bind to DNA in live or fixed cells. Therefore, these stains are often called supravital, which means that cells survive a treatment with these compounds. Cells that express specific ATP-binding cassette transporter proteins can also actively transport these stains out of their cytoplasm.

  • CAS Number: 158013-41-3
  • MF: C25H23IN6
  • MW: 534.39500
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

LDS 751

LDS-751 is a nucleic acid stain.

  • CAS Number: 181885-68-7
  • MF: C25H30ClN3O4
  • MW: 471.976
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Luciferase, firefly

Luciferase, firefly is the light-emitting enzyme responsible for the bioluminescence of fireflies and click beetles.

  • CAS Number: 61970-00-1
  • MF: C19H20N2O4
  • MW:
  • Catalog: Peptides
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Fura-2, AM

Fura-2 AM is a ratiometric fluorescent Ca2+ indicator.

  • CAS Number: 108964-32-5
  • MF: C44H47N3O24
  • MW: 1001.850
  • Catalog: Dye Reagents
  • Density: 1.4±0.1 g/cm3
  • Boiling Point: 975.9±75.0 °C at 760 mmHg
  • Melting Point: N/A
  • Flash Point: 544.0±37.1 °C

5(6)-Aminofluorescein

5(6)-Aminofluorescein is a high purity and quality chemical used as molecular probe and important as fluorescent agent.

  • CAS Number: 27599-63-9
  • MF: C20H13NO5
  • MW: 347.321
  • Catalog: Dye Reagents
  • Density: 1.6±0.1 g/cm3
  • Boiling Point: 695.3±55.0 °C at 760 mmHg
  • Melting Point: 223ºC (dec.)(lit.)
  • Flash Point: 374.3±31.5 °C

para-iodoHoechst 33258

Hoechst stains are part of a family of blue fluorescent dyes used to stain DNA. Hoechst 33258 is a cell dye for DNA quantitation.IC50 Value:These Bis-benzimides were originally developed by Hoechst AG, which numbered all their compounds so that the dye Hoechst 33342 is the 33342nd compound made by the company. There are three related Hoechst stains: Hoechst 33258, Hoechst 33342, and Hoechst 34580. The dyes Hoechst 33258 and Hoechst 33342 are the ones most commonly used and they have similarexcitation/emission spectra. Both dyes are excited by ultraviolet light at around 350 nm, and both emit blue/cyan fluorescent light around anemission maximum at 461 nm. Unbound dye has its maximum fluorescence emission in the 510-540 nm range. Hoechst dyes are soluble in water and in organic solvents such as dimethyl formamide or dimethyl sulfoxide. Concentrations can be achieved of up to 10 mg/mL. Aqueous solutions are stable at 2-6 °C for at least six months when protected from light. For long-term storage the solutions are instead frozen at ≤-20 °C.The dyes bind to the minor groove of double-stranded DNA with a preference for sequences rich in adenine andthymine. Although the dyes can bind to all nucleic acids, AT-rich double-stranded DNA strands enhance fluorescence considerably.Hoechst dyes are cell-permeable and can bind to DNA in live or fixed cells. Therefore, these stains are often called supravital, which means that cells survive a treatment with these compounds. Cells that express specific ATP-binding cassette transporter proteins can also actively transport these stains out of their cytoplasm.

  • CAS Number: 158013-43-5
  • MF: C25H23IN6
  • MW: 534.39500
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: N/A
  • Melting Point: N/A
  • Flash Point: N/A

Nile Blue A (sulfate)

Nile Blue A is used to differentiate melanins and lipofuscins. It is also useful for staining fats and preparation of an amperometric glucose sensor.

  • CAS Number: 3625-57-8
  • MF: C20H20N3O3S0.5
  • MW: 366.42
  • Catalog: Dye Reagents
  • Density: N/A
  • Boiling Point: 487.9ºC
  • Melting Point: >300ºC (dec.)(lit.)
  • Flash Point: 248.8ºC