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ChemicalBook >> CAS DataBase List >> FLUORESCEIN-5-MALEIMIDE

FLUORESCEIN-5-MALEIMIDE

FLUORESCEIN-5-MALEIMIDE price.
  • $32 - $6168
  • Product name: FLUORESCEIN-5-MALEIMIDE
  • CAS: 75350-46-8
  • MF: C24H13NO7
  • MW: 427.36
  • EINECS:
  • MDL Number:MFCD00077345
  • Synonyms:FLUORESCEIN-5-MALEIMIDE;1-(3',6'-Dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthen]-5-yl)-1H-pyrrole-2,5-dione;5-MF [Fluorescein-5-MaleiMide];5-Maleimido-fluorescein;N-(5-Fluoresceinyl)maleimide;1-(3',6'-Dihydroxy-3-oxospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-5-yl)-1H-pyrrole-2,5-dione;5-Maleimido-fluorescein;5-MF [FLUORESCEIN-5-MALEIMIDE];5-MALEIMIDO-FLUORESCEIN
Price49 Properties Safety Information Description
49 prices
Selected condition：
Brand
  • aablocks
  • ACHEMBLOCK
  • Adipogen Life Sciences
  • AK Scientific
  • Ambeed
  • American Custom Chemicals Corporation
  • ApexBio Technology
  • Cayman Chemical
  • Chemenu
  • ChemScene
  • Crysdot
  • DC Chemicals
  • Medical Isotopes, Inc.
  • Sigma-Aldrich
  • TCI Chemical
  • TRC
  • Usbiological
Package
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  • 1g
  • 5g
  • Manufactureraablocks
  • Product numberAA005XXS
  • Product description1-(3',6'-Dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthen]-5-yl)-1H-pyrrole-2,5-dione ≥97%(HPLC)
  • Packaging5mg
  • Price$32
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA005XXS
  • Product description1-(3',6'-Dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthen]-5-yl)-1H-pyrrole-2,5-dione 95%
  • Packaging10mg
  • Price$38
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA005XXS
  • Product description1-(3',6'-Dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthen]-5-yl)-1H-pyrrole-2,5-dione 95%
  • Packaging25mg
  • Price$77
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA005XXS
  • Product description1-(3',6'-Dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthen]-5-yl)-1H-pyrrole-2,5-dione 95%
  • Packaging50mg
  • Price$115
  • Updated2026-05-28
  • Buy
  • Manufactureraablocks
  • Product numberAA005XXS
  • Product description1-(3',6'-Dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthen]-5-yl)-1H-pyrrole-2,5-dione
  • Packaging100mg
  • Price$195
  • Updated2026-05-28
  • Buy
  • ManufacturerACHEMBLOCK
  • Product numberY226948
  • Product descriptionFluorescein-5-maleimide 97.00%
  • Packaging100MG
  • Price$260
  • Updated2026-05-27
  • Buy
  • ManufacturerACHEMBLOCK
  • Product numberY226948
  • Product descriptionFluorescein-5-maleimide 97.00%
  • Packaging500MG
  • Price$780
  • Updated2026-05-27
  • Buy
  • ManufacturerAdipogen Life Sciences
  • Product numberCDX-F0004-M500
  • Product descriptionN-(5-Fluoresceinyl)-maleinimide ≥90%(HPLC)
  • Packaging500mg
  • Price$1784
  • Updated2026-05-06
  • Buy
  • ManufacturerAdipogen Life Sciences
  • Product numberCDX-F0004-M050
  • Product descriptionN-(5-Fluoresceinyl)-maleinimide ≥90%(HPLC)
  • Packaging50mg
  • Price$218
  • Updated2026-05-06
  • Buy
  • ManufacturerAK Scientific
  • Product number1708AC
  • Product descriptionFluorescein-5-maleimide
  • Packaging25mg
  • Price$266
  • Updated2021-12-16
  • Buy
  • ManufacturerAK Scientific
  • Product number1708AC
  • Product descriptionFluorescein-5-maleimide
  • Packaging50mg
  • Price$336
  • Updated2021-12-16
  • Buy
  • ManufacturerAmbeed
  • Product numberA633839
  • Product descriptionFluorescein-5-maleimide 95%
  • Packaging100mg
  • Price$289
  • Updated2026-06-05
  • Buy
  • ManufacturerAmbeed
  • Product numberA633839
  • Product descriptionFluorescein-5-maleimide 95%
  • Packaging50mg
  • Price$145
  • Updated2026-06-05
  • Buy
  • ManufacturerAmbeed
  • Product numberA633839
  • Product descriptionFluorescein-5-maleimide 95%
  • Packaging25mg
  • Price$97
  • Updated2026-06-05
  • Buy
  • ManufacturerAmbeed
  • Product numberA633839
  • Product descriptionFluorescein-5-maleimide 95%
  • Packaging10mg
  • Price$48
  • Updated2026-06-05
  • Buy
  • ManufacturerAmbeed
  • Product numberA633839
  • Product descriptionFluorescein-5-maleimide 95%
  • Packaging250mg
  • Price$570
  • Updated2026-06-05
  • Buy
Manufacturer Product number Product description Packaging Price Updated Buy
aablocks AA005XXS 1-(3',6'-Dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthen]-5-yl)-1H-pyrrole-2,5-dione ≥97%(HPLC) 5mg $32 2026-05-28 Buy
aablocks AA005XXS 1-(3',6'-Dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthen]-5-yl)-1H-pyrrole-2,5-dione 95% 10mg $38 2026-05-28 Buy
aablocks AA005XXS 1-(3',6'-Dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthen]-5-yl)-1H-pyrrole-2,5-dione 95% 25mg $77 2026-05-28 Buy
aablocks AA005XXS 1-(3',6'-Dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthen]-5-yl)-1H-pyrrole-2,5-dione 95% 50mg $115 2026-05-28 Buy
aablocks AA005XXS 1-(3',6'-Dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthen]-5-yl)-1H-pyrrole-2,5-dione 100mg $195 2026-05-28 Buy
ACHEMBLOCK Y226948 Fluorescein-5-maleimide 97.00% 100MG $260 2026-05-27 Buy
ACHEMBLOCK Y226948 Fluorescein-5-maleimide 97.00% 500MG $780 2026-05-27 Buy
Adipogen Life Sciences CDX-F0004-M500 N-(5-Fluoresceinyl)-maleinimide ≥90%(HPLC) 500mg $1784 2026-05-06 Buy
Adipogen Life Sciences CDX-F0004-M050 N-(5-Fluoresceinyl)-maleinimide ≥90%(HPLC) 50mg $218 2026-05-06 Buy
AK Scientific 1708AC Fluorescein-5-maleimide 25mg $266 2021-12-16 Buy
AK Scientific 1708AC Fluorescein-5-maleimide 50mg $336 2021-12-16 Buy
Ambeed A633839 Fluorescein-5-maleimide 95% 100mg $289 2026-06-05 Buy
Ambeed A633839 Fluorescein-5-maleimide 95% 50mg $145 2026-06-05 Buy
Ambeed A633839 Fluorescein-5-maleimide 95% 25mg $97 2026-06-05 Buy
Ambeed A633839 Fluorescein-5-maleimide 95% 10mg $48 2026-06-05 Buy
Ambeed A633839 Fluorescein-5-maleimide 95% 250mg $570 2026-06-05 Buy
Next Last

Properties

Melting point :>275°C (dec.)
Boiling point :769.1±60.0 °C(Predicted)
Density :1.73±0.1 g/cm3(Predicted)
storage temp. :Keep in dark place,Inert atmosphere,2-8°C
solubility :Acetone (Slightly), DMSO (Slightly), Methanol (Slightly)
pka :9.31±0.20(Predicted)
form :Red powder.
color :Orange to Brown
Appearance :Orange to Brown Solid
Stability :Light Sensitive
InChI :InChI=1S/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
InChIKey :AYDAHOIUHVUJHQ-UHFFFAOYSA-N
SMILES :N1(C2C=CC3C4(C5=C(C=C(O)C=C5)OC5=C4C=CC(O)=C5)OC(=O)C=3C=2)C(=O)C=CC1=O
CAS DataBase Reference :75350-46-8

Safety Information

Symbol(GHS): Exclamation Mark (GHS07)
Signal word: Warning
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H341 Suspected of causing genetic defects Germ cell mutagenicity Category 2 Warning P201,P202, P281, P308+P313, P405,P501
H360 May damage fertility or the unborn child Reproductive toxicity Category 1A, 1B Danger
H371 May cause damage to organs Specific target organ toxicity, single exposure Category 2 Warning P260, P264, P270, P309+P311, P405,P501
H373 May cause damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 2 Warning P260, P314, P501
Precautionary statements:
P201 Obtain special instructions before use.
P202 Do not handle until all safety precautions have been read and understood.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P264 Wash hands thoroughly after handling.
P264 Wash skin thouroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P302+P352 IF ON SKIN: wash with plenty of soap and water.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P332+P313 IF SKIN irritation occurs: Get medical advice/attention.
P337+P313 IF eye irritation persists: Get medical advice/attention.
P405 Store locked up.
P501 Dispose of contents/container to..…

Description

Fluorescein-5-maleimide is an activated fluorescent molecule (excitation: 494 nm, emission: 519 nm) that is used to easily conjugate fluorescein to proteins. The maleimide group reacts optimally with sulfhydryl groups on cysteine side chains at pH 7, forming a stable thioether bond. The compound can be used to label proteins for the detection of conformational changes, assembly of multisubunit complexes, and ligand-binding processes.

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Suppliers and manufacturers

TargetMol Chemicals Inc.
Fluorescein-5-maleimide
$32.00
Fluorescein-5-maleimide CAS:75350-46-8
CONIER CHEM AND PHARMA LIMITED
Zhengzhou Alfa Chemical Co.,Ltd
HANGZHOU LEAP CHEM CO., LTD.
Shanghai Acmec Biochemical Technology Co., Ltd.
Aladdin Scientific
ANHUI BYERSEN BIOTECH CO. LTD
Amadis Chemical Company Limited Nanjing UltraPure Biotech Co., Ltd. Suzhou Daolan Biomedical Technology Co., Ltd.