Fluorescein-5-maleimide - ≥97%(HPLC) , CAS No.75350-46-8

CAS: 75350-46-8 Cat. No.: M131300 Molecular Weight: 427.363 EC Number: 635-131-8
AVAILABLE TO ORDER
GRADE & PURITY ≥97%(HPLC)
Synonyms
5-MF | SCHEMBL454005 | W-100077 | C24H13NO7 | D90687 | Fluorescein-5-maleimide (contains 2% N,N-Dimethylformamide at maximum) | 5-Maleimidofluorescein | AKOS016008608 | A923201 | FT-0626456 | 5-MF | 1H-Pyrrole-2,5-dione, 1-(3',6'-dihydroxy-3-oxospiro(isob
Storage
Store at -20°C,Argon charged
Shipped In
Ice chest + Ice pads
 ·  off list, applied to all prices below.
Size
Status
Price
Qty
5mg
M131300-5mg
3

$31.90

$47.90
Save $16.00 (33.40%)
25mg
M131300-25mg
5

$129.90

$194.90
Save $65.00 (33.35%)
100mg
M131300-100mg
1

$468.90

$703.90
Save $235.00 (33.39%)
Enter a quantity for the sizes you want to add.
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Why this grade

≥97%(HPLC) for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

🌡

Storage & shipping

Store at -20°C,Argon charged Ships Ice chest + Ice pads Check lot-specific COA for exact specifications.

📋

Quality documents

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

📚

Literature proof

Cited in 3 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Overview

Fluorescein 5-Maleimide is a protein and peptide fluorescent labeling reagent. 5-MF is a thiol-reactive Fluorescent Probe for bioconjugation.
It is used to fluorescence label molecules such as proteins and peptides via their thiol groups.

Specifications

Synonyms
5-MF | SCHEMBL454005 | W-100077 | C24H13NO7 | D90687 | Fluorescein-5-maleimide (contains 2% N, N-Dimethylformamide at maximum) | 5-Maleimidofluorescein | AKOS016008608 | A923201 | FT-0626456 | 5-MF | 1H-Pyrrole-2, 5-dione, 1-(3', 6'-dihydroxy-3-oxospiro(isob
Specifications & Purity
≥97%(HPLC)
Biochemical and Physiological Mechanisms
Fluorescein-5-maleimide is a fluorescent thiol-reactive dye used to conjugate fluorescein to proteins (excitation: 494 nm, emission: 519 nm).
Storage
Store at -20°C, Argon charged
Shipped In
Ice chest + Ice pads
This product requires cold chain shipping. Ground and other economy services are not available.
Purity
≥97%(HPLC)
Names and Identifiers
Canonical SmilesC1=CC2=C(C=C1N3C(=O)C=CC3=O)C(=O)OC24C5=C(C=C(C=C5)O)OC6=C4C=CC(=C6)O
IUPAC Name1-(3',6'-dihydroxy-3-oxospiro[2-benzofuran-1,9'-xanthene]-5-yl)pyrrole-2,5-dione
InChIKeyAYDAHOIUHVUJHQ-UHFFFAOYSA-N
INCHI1S/C24H13NO7/c26-13-2-5-17-19(10-13)31-20-11-14(27)3-6-18(20)24(17)16-4-1-12(9-15(16)23(30)32-24)25-21(28)7-8-22(25)29/h1-11,26-27H
Isomeric SMILES C1=CC2=C(C=C1N3C(=O)C=CC3=O)C(=O)OC24C5=C(C=C(C=C5)O)OC6=C4C=CC(=C6)O
WGK Germany 3
Molecular Weight 427.363
Reaxy-Rn 7953995
Reaxys-RN_link_address https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=7953995&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  Maleimides  N-substituted carboxylic acid imides  Pyrrolines  Dicarboximides  Carboxylic acid esters  Lactones  Oxacyclic compounds  Monocarboxylic acids and derivatives  Azacyclic compounds  Hydrocarbon derivatives  Organic oxides  Organonitrogen compounds  Carbonyl compounds  Organopnictogen compounds  
Molecular FrameworkAromatic heteropolycyclic compounds
Substituents Xanthene - Diaryl ether - Benzofuranone - Phthalide - Isobenzofuranone - Isocoumaran - Isobenzofuran - 1-hydroxy-2-unsubstituted benzenoid - Maleimide - Carboxylic acid imide, n-substituted - Benzenoid - Carboxylic acid imide - Dicarboximide - Pyrroline - Lactone - Carboxylic acid ester - Monocarboxylic acid or derivatives - Ether - Carboxylic acid derivative - Oxacycle - Azacycle - Carbonyl group - Organic oxide - Organooxygen compound - Organonitrogen compound - Organopnictogen compound - Organic nitrogen compound - Organic oxygen compound - 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





Mechanisms of Action
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.

6 results found

Lot NumberCertificate TypeDateItem
J2222391Certificate of AnalysisMay 11, 2026 M131300
J2222392Certificate of AnalysisMay 11, 2026 M131300
J2222393Certificate of AnalysisMay 11, 2026 M131300
B2627196Certificate of AnalysisMar 05, 2026 M131300
C2221002Certificate of AnalysisMar 25, 2022 M131300
C2026076Certificate of AnalysisFeb 15, 2022 M131300
Chemical and Physical Properties
SensitivityHeat & Light & Moisture & Air-sensitive
Molecular Weight427.400 g/mol
XLogP32.500
Hydrogen Bond Donor Count2
Hydrogen Bond Acceptor Count7
Rotatable Bond Count1
Exact Mass427.069 Da
Monoisotopic Mass427.069 Da
Topological Polar Surface Area113.000 Ų
Heavy Atom Count32
Formal Charge0
Complexity826.000
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
1. Yingjie Zhang, Changfei Duan, Qing Li, Yuchen Bai, Baolei Dong, Yingying Tang, Min He, Chenqi Hao, Kai Wen, Jianzhong Shen, Zhanhui Wang.  (2022)  Fluorescence polarization immunoassay based on fragmentary hapten for rapid and sensitive screening of polymyxins in human serum.  SENSORS AND ACTUATORS B-CHEMICAL,      [PMID:] [10.1016/j.snb.2022.132404]
2. Huixia Di, Erzao Zeng, Pengjuan Zhang, Xuehui Liu, Cai Zhang, Jie Yang, Dingbin Liu.  (2019)  General Approach to Engineering Extracellular Vesicles for Biomedical Analysis.  ANALYTICAL CHEMISTRY,      [PMID:31529961] [10.1021/acs.analchem.9b02268]
3. Zhijiao Huang, Yong Liu, Lungang Chen, Xinghua Zhang, Jianguo Liu, Chenguang Wang, Qi Zhang, Longlong Ma.  (2024)  Selective hydrodeoxygenation of 5-hydromethylfurfural to 2,5-dimethylfuran over PtFe/C catalyst.  Molecular Catalysis,      [PMID:] [10.1016/j.mcat.2024.114169]
Solution Calculators
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