CAS 2321-07-5

Fluorescein

Description:

Fluorescein, with the CAS number 2321-07-5, is a synthetic organic compound known for its vibrant fluorescent properties. It appears as a bright green powder or crystalline solid and is soluble in water, alcohol, and other organic solvents. Fluorescein is characterized by its strong fluorescence under ultraviolet light, making it widely used as a fluorescent tracer in various applications, including biological imaging, dyeing, and as a pH indicator. Its molecular structure consists of a xanthene core, which contributes to its fluorescence, and it exhibits a high molar absorptivity, enhancing its visibility in solutions. Fluorescein is non-toxic at low concentrations, but care should be taken to avoid excessive exposure. In addition to its use in scientific research, it is also employed in medical diagnostics, particularly in ophthalmology for assessing corneal integrity and in angiography. Overall, fluorescein is a versatile compound with significant utility in both laboratory and clinical settings.

Formula: C₂₀H₁₂O₅

InChI: InChI=1/C20H12O5/c21-11-5-7-15-17(9-11)24-18-10-12(22)6-8-16(18)20(15)14-4-2-1-3-13(14)19(23)25-20/h1-10,21-22H

InChI key: InChIKey=GNBHRKFJIUUOQI-UHFFFAOYSA-N

SMILES: O=C1OC2(C=3C1=CC=CC3)C=4C(OC=5C2=CC=C(O)C5)=CC(O)=CC4

Synonyms:

• 2-(6-Hydroxy-3-oxo-(3H)-xanthen-9-yl)benzoesaure
• 2-(6-hydroxy-3-oxo-(3H)-xanthen-9-yl)benzoic acid
• 3',6'-Dihydroxyfluoran
• 3',6'-Dihydroxyspiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one
• 3',6'-Fluorandiol
• 3,6-Dihydroxyspiro[xanthene-9,3'-phthalide]
• 3′,6′-Dihydroxyfluoran
• 3′,6′-Dihydroxyspiro[2-benzofuran-3,9′-xanthene]-1-one
• 3′,6′-Dihydroxyspiro[isobenzofuran-1(3H),9′-[9H]xanthen]-3-one
• 3′,6′-Fluorandiol
• 9-(o-Carboxyphenyl)-6-hydroxy-3-isoxanthenone
• Acide 2-(6-hydroxy-3-oxo-(3H)-xanthen-9-yl)benzoique
• Benzoic acid, 2-(6-hydroxy-3-oxo-3H-xanthen-9-yl)-
• D and C Yellow No. 7
• D&C Yellow No. 7
• D&C Yellow 7
• F 0095
• Fluorescein
• Fluorescein acid
• Japan Yellow 201
• Japan Yellow No. 201
• Nsc 667256
• Resorcinolphthalein
• Solvent Yellow 94
• Spiro[isobenzofuran-1(3H),9′-[9H]xanthen]-3-one, 3′,6′-dihydroxy-
• Yellow No. 201
• Yellow fluorescein
• acide 2-(6-hydroxy-3-oxo-(3H)-xanthene-9-yl)benzoique
• acido 2-(6-hidroxi-3-oxo-(3H)-xanten-9-il)benzoico
• Fluorescein Free Acid
• C.I. Solvent Yellow 94
• Fluorescein [BAN:JAN]
• 3,6-dihydroxyspiro[isobenzofuran-1(3H),9-xanthen]-3-one
• C.I. 45350.1
• C.I. 45350:1
• 2-(6-hydroxy-3-oxo-3h-xanthen-9-yl)-benzoicaci
• FLUORESCEIN, ALCOHOL SOLUBLE
• 3’,4’-dehydroxyfluoran
• ACID YELLOW 73
• CI NO 45350
• CI 45350:1
• RESORCINOL PHTHALEIN
• 3’,6’-dihydroxy-fluora
• CI 45350
• S NO 880
• 11712yellow

Fluorescein

CAS: 2321-07-5

Formula: C₂₀H₁₂O₅

Color and Shape: Orange to Amber to Dark red powder to crystal

Molecular weight: 332.31

Ref: 3B-F0095

Fluorescein

CAS: 2321-07-5

Fluorescein is used as a fluorescent tracer for many applications including in a type of dye laser as the gain medium, in forensics and serology to detect latent blood stains and in dye tracing. It is used to localise multiple muscular ventricular septal defects during open heart surgery and confirm

Formula: C₂₀H₁₂O₅

Purity: 90+%

Color and Shape: Powder, Orange to red to brown

Molecular weight: 332.31

Ref: 02-L13251

FLUORESCEIN CRS

CAS: 2321-07-5

FLUORESCEIN CRS

Formula: C₂₀H₁₂O₅

Color and Shape: Orange. Red. Powder.

Molecular weight: 332.3063

Ref: 41-Y0000796

Fluorescein

CAS: 2321-07-5

Synthetic organic coloring matter,nesoi

Formula: C₂₀H₁₂O₅

Color and Shape: Red Orange Crystalline Powder

Molecular weight: 332.31

Ref: 45-1277004

Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, 3',6'-dihydroxy-

CAS: 2321-07-5

Formula: C₂₀H₁₂O₅

Purity: 85%

Color and Shape: Solid

Molecular weight: 332.3063

Ref: IN-DA002MJP

Fluorescein

CAS: 2321-07-5

Fluorescein

Formula: C₂₀H₁₂O₅

Purity: ≥80%

Molecular weight: 332.31

Ref: 54-BUP19327

Fluorescein

CAS: 2321-07-5

Fluorescein (Solvent Yellow 94) is a phthalic indicator dye, use as a synthetic fluorescent tracer.

Formula: C₂₀H₁₂O₅

Purity: 88.76% - 95.04%

Color and Shape: Red Orthorhombic Prisms Alkaline Solutions Exhibit Intense Greenish-Yellow Fluorescence By Reflected Light Low Toxicity May

Molecular weight: 332.31

Ref: TM-T1392

Fluorescein (C.I. 45350.1)

CAS: 2321-07-5

Formula: C₂₀H₁₂O₅

Purity: 95.0 - 105.0 %

Color and Shape: Orange to red powder

Molecular weight: 332.32

Ref: 7W-GT3509

Fluorescein

CAS: 2321-07-5

Fluorescein

Formula: C₂₀H₁₂O₅

Purity: IND

Color and Shape: Solid-Powder

Molecular weight: 332.31

Ref: 54-OR1013318

Fluorescein

CAS: 2321-07-5

Fluorescein

Formula: C₂₀H₁₂O₅

Purity: 95%

Molecular weight: 332.31

Ref: 54-OR1013317

Fluorescein

CAS: 2321-07-5

Formula: C₂₀H₁₂O₅

Molecular weight: 332.31

Ref: 4Z-F-136001

Fluorescein

CAS: 2321-07-5

Applications A fluorescent tracer used for many applications. It is used in ophthalmology as a tool in the diagnosis of corneal abrasions, corneal ulcers and herpetic corneal infections. It can attach to certain biologically active molecules, thus allowing biologists to target the fluorophore to specific proteins or structures within cells. Dyes and metabolites.
References Drees, B.L. et al.: J. Biol. Chem., 271, 32168 (1996); Can. Med. Assoc. J., 80, 997 (1959); Taki, M. et al.: Prot. Eng. Des. Select., 17, 119 (2004);

Formula: C₂₀H₁₂O₅

Color and Shape: Neat

Molecular weight: 332.31

Ref: TR-F485250

Fluorescein

CAS: 2321-07-5

Fluorescein is a fluorescent molecule often used in in vitro assays, immunohistochemistry, microscopy, and clinical analytics. Fluorescein is not a natural product and was first synthesized in 1871 by Adolf von Baeyer, a later Nobel-prize winner for his work on organic dyes. Fluorescein has an absorption maximum of 494 nm and an emission maximum of 512 nm; these values can however slightly change depending on the solution medium. Fluorescein is used clinically in ophthalmology to assess the blood flow in the eye blood vessels and to detect eye injuries such as foreign bodies and possible abrasions. Interestingly, fluorescein has been found to possess peroxidase activity under certain conditions.

Formula: C₂₀H₁₂O₅

Color and Shape: Powder

Molecular weight: 332.31 g/mol

Ref: 3D-FF23342

Fluorescein Free Acid (C.I. No. 45350:1), 96%

CAS: 2321-07-5

Formula: C₂₀H₁₂O₅

Purity: min. 96%

Color and Shape: Orange to red brown or maroon, Powder, Clear

Molecular weight: 332.31

Ref: SR-50389

Fluorescein

CAS: 2321-07-5

M03615 - Fluorescein

Formula: C₂₀H₁₂O₅

Purity: 90%

Color and Shape: Solid, Crystalline Powder or Powder

Molecular weight: 332.311

Ref: 10-M03615

Fluorescein, indicator

CAS: 2321-07-5

Purity: IND

Molecular weight: 332.07

Ref: 10-F094738

Fluorescein

CAS: 2321-07-5

Formula: C₂₀H₁₂O₅

Molecular weight: 332.31

Ref: ST-EA-CP-F116000

Yellow No.201 for TLC RS

CAS: 2321-07-5

Color and Shape: Yellow-Brown To Red-Brown Solid Grains Or Powder

Ref: 2K-4026000021