FAM amine, 5-isomer

Cat. # Quantity Price Lead time
141C0 1 mg $110 in stock
241C0 5 mg $210 in stock
441C0 25 mg $410 in stock
541C0 50 mg $695 in stock
641C0 100 mg $1190 in stock
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Fluorescein (FAM) amine, isomerically pure dye (5-isomer). Unlike fluoresceinamine, this reagent contains a linker arm with an aliphatic amine group that is more reactive. It can react with electrophilic reagents like activated esters or epoxides, and be involved in enzymatic transamination.

FAM absorbance and emission spectra

FAM absorbance and emission spectra

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FAM NHS ester, 6-isomer

Activated N-hydroxysuccinimide ester of fluorescein (FAM), pure 6-isomer.

General properties

Appearance: yellow solid
Molecular weight: 510.97
CAS number: 2183440-41-5 (hydrochloride), 138589-19-2
Molecular formula: C27H27N2ClO6
IUPAC name: 6-aminohexylaminocarbonylfluorescein hydrochloride
Solubility: good in methanol, DMSO, DMF
Quality control: NMR 1H, HPLC-MS (95%)
Storage conditions: 24 months after receival at -20°C in the dark. Transportation: at room temperature for up to 3 weeks. Avoid prolonged exposure to light. Desiccate.
MSDS: Download
Product specifications

Spectral properties

Excitation/absorption maximum, nm: 492
ε, L⋅mol−1⋅cm−1: 74000
Emission maximum, nm: 517
Fluorescence quantum yield: 0.93
CF260: 0.22
CF280: 0.17

Product citations

  1. Sotnikov, D.V.; Byzova, N.A.; Zherdev, A.V.; Dzantiev, B.B. Ability of Antibodies Immobilized on Gold Nanoparticles to Bind Small Antigen Fluorescein. International Journal of Molecular Sciences, 2023, 24(23), 16967. doi: 10.3390/ijms242316967
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