5-Aminofluorescein(5-AF) - ≥96% , CAS No.3326-34-9

CAS: 3326-34-9 Cat. No.: A110141 Molecular Weight: 347.32 Beilstein Registry Number: 48395 EC Number: 222-043-6
AVAILABLE TO ORDER
GRADE & PURITY ≥96%
Synonyms
Fluoresceinamine, isomer 1 | Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 5-amino-3',6'-dihydroxy- | fluorescein-5-amine | EX-A1779 | Fluoresceinamine isomer 1 | SCHEMBL220211 | 5-Amino-3',6'-dihydroxyspiro[isobenzofuran-1(3H),9'-(9H)xanthen]-3-one |
Storage
Argon charged,Room temperature
Shipped In
Normal
 ·  off list, applied to all prices below.
Size
Status
Price
Qty
250mg
A110141-250mg
4
$15.90
1g
A110141-1g
4
$39.90
5g
A110141-5g
1
$129.90
Enter a quantity for the sizes you want to add.
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Why this grade

≥96% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

🌡

Storage & shipping

Argon charged,Room temperature Ships Normal Check lot-specific COA for exact specifications.

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Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

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Literature proof

Cited in 28 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Overview

Fluoresceinamine, isomer I is a building block for synthesis of fluorescein.
A reagent for fluorescence studies

Specifications

Synonyms
Fluoresceinamine, isomer 1 | Spiro(isobenzofuran-1(3H), 9'-(9H)xanthen)-3-one, 5-amino-3', 6'-dihydroxy- | fluorescein-5-amine | EX-A1779 | Fluoresceinamine isomer 1 | SCHEMBL220211 | 5-Amino-3', 6'-dihydroxyspiro[isobenzofuran-1(3H), 9'-(9H)xanthen]-3-one |
Specifications & Purity
≥96%
Biochemical and Physiological Mechanisms
Fluorescence marker. Selectively targets malignant glioma tissue in vivo when covalently linked to human serum albumin at a molar ratio of 1:1without bleaching nor penetrating into surrounding brain edema or necrotic tissue. Blood-brain barrier permeable.
Storage
Argon charged, Room temperature
Shipped In
Normal
Note
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour. Toxic, refer to SDS for further information. Need more advice on solubility, usage and handling? Please visit our frequently asked questions (FAQ) page for more details.
Purity
≥96%
Names and Identifiers
Canonical SmilesC1=CC2=C(C=C1N)C(=O)OC23C4=C(C=C(C=C4)O)OC5=C3C=CC(=C5)O
IUPAC Name6-amino-3',6'-dihydroxyspiro[2-benzofuran-3,9'-xanthene]-1-one
InChIKeyGZAJOEGTZDUSKS-UHFFFAOYSA-N
INCHI1S/C20H13NO5/c21-10-1-4-14-13(7-10)19(24)26-20(14)15-5-2-11(22)8-17(15)25-18-9-12(23)3-6-16(18)20/h1-9,22-23H,21H2
Isomeric SMILES C1=CC2=C(C=C1N)C(=O)OC23C4=C(C=C(C=C4)O)OC5=C3C=CC(=C5)O
WGK Germany 3
Molecular Weight 347.32
Beilstein 48395
Reaxy-Rn 48395
Reaxys-RN_link_address https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=48395&ln=

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

Download SDS →

✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

Look up COA →

📊 Datasheet

Quick-reference summary of product specifications and applications.

View datasheet →

🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

View spec sheet →

Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassOrganoheterocyclic compounds
ClassBenzopyrans
Subclass1-benzopyrans
Intermediate Tree Nodes Dibenzopyrans
Direct ParentXanthenes
Alternative Parents Diarylethers  Phthalides  Benzofuranones  Isobenzofurans  1-hydroxy-2-unsubstituted benzenoids  Lactones  Carboxylic acid esters  Amino acids and derivatives  Oxacyclic compounds  Monocarboxylic acids and derivatives  Primary amines  Organopnictogen compounds  Organic oxides  Hydrocarbon derivatives  
Molecular FrameworkAromatic heteropolycyclic compounds
Substituents Xanthene - Diaryl ether - Benzofuranone - Phthalide - Isobenzofuranone - Isocoumaran - Isobenzofuran - 1-hydroxy-2-unsubstituted benzenoid - Benzenoid - Carboxylic acid ester - Lactone - Amino acid or derivatives - Monocarboxylic acid or derivatives - Ether - Carboxylic acid derivative - Oxacycle - Primary amine - Organic oxide - Organooxygen compound - Organonitrogen compound - Organopnictogen compound - Organic nitrogen compound - Organic oxygen compound - Amine - Hydrocarbon derivative - Aromatic heteropolycyclic compound
DescriptionThis compound belongs to the class of organic compounds known as xanthenes. These are polycyclic aromatic compounds containing a xanthene moiety, which consists of two benzene rings joined to each other by a pyran ring.
External Descriptors Not available
3D Structure
Interactive Chemical Structure Model





Certificates(CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

11 results found

Lot NumberCertificate TypeDateItem
G2216112Certificate of AnalysisApr 07, 2026 A110141
G2216122Certificate of AnalysisApr 07, 2026 A110141
C2605283Certificate of AnalysisFeb 10, 2026 A110141
C2605302Certificate of AnalysisFeb 10, 2026 A110141
C2605303Certificate of AnalysisFeb 10, 2026 A110141
F2130051Certificate of AnalysisApr 09, 2025 A110141
F2130052Certificate of AnalysisApr 03, 2025 A110141
B2325307Certificate of AnalysisMay 30, 2022 A110141
B2325306Certificate of AnalysisMay 27, 2021 A110141
B2527323Certificate of AnalysisMay 27, 2021 A110141
C2210084Certificate of AnalysisMay 27, 2021 A110141

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Chemical and Physical Properties
SolubilitySoluble in water (partly), methanol (10 mg/ml), and acetone.
SensitivityHygroscopic,Heat & light sensitive.
Melt Point(°C)223℃
Molecular Weight347.300 g/mol
XLogP32.700
Hydrogen Bond Donor Count3
Hydrogen Bond Acceptor Count6
Rotatable Bond Count0
Exact Mass347.079 Da
Monoisotopic Mass347.079 Da
Topological Polar Surface Area102.000 Ų
Heavy Atom Count26
Formal Charge0
Complexity557.000
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count1
Documents & Articles
Citations of This Product
References
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