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| CAS-Number: | 75350-46-8 |
|---|---|
| Molecular Weight: | 427.4 |
| Empirical Formula: | C24H13NO7 |
| Absorption [nm]: | 492 ± 3 |
| Emission [nm]: | 513 ± 3 |
| ε [M-1 cm-1]: | >80 000 |
| Buffer System for Optical Spectroscopy: | T&S Buffer, pH 9 |
| Solubility: | DMF |
| Appearance (colour): | Yellow orange |
| Appearance (form): | Solid (powder) |
| Storage: | - 20 °C. Keep dry! Keep away from light, especially in solution! |
| Trade name: | Fluorescein-5-maleimide, 5-FMI |
| Reactive Moiety: | Maleinimid, reacts with thiols to form a stable thioether linkage |
Fluorescein is a bright green dye with excitation/emission maxima of 492/517 nm. It offers a high quantum yield, is fully compatible with fluorescein (FITC) filter sets, and closely matches the 488 nm spectral line of the argon-ion laser. Common applications include labeling peptides, proteins, oligonucleotides, and other biomolecules for fluorescence microscopy, flow cytometry and in vitro assays.
This 5-maleimide activated derivative enables covalent modification of the thiol group found on cysteine or with thiol-modified oligonucleotides to form a stable carbon-sulfur bond. The product is provided as single isomer.
Not a hazardous substance or mixture according to Regulation (EC) No. 1272/2008.
Downloads
WGK
WGK 3
Storage Class Code
13 - Non-flammable solids in non-flammable package
ADR, RID (road and railroad)
Not dangerous goods
IATA-DGR (transport by air)
Not dangerous goods
IMDG-Code (transport by sea)
Not dangerous goods
Kein gefährlicher Stoff oder gefährliches Gemisch gemäß der Verordnung (EG) Nr. 1272/2008 [CLP].
Downloads
WGK
WGK 3
Lagerklasse
13 - Nicht brandgefährliche Feststoffe in nicht brandgefährlicher Verpackung
ADR, RID (Strasse und Eisenbahn)
Kein Gefahrgut
IATA-DGR (Luftverkehr)
Kein Gefahrgut
IMDG (Seeschiffverkehr)
Kein Gefahrgut