DAF FM diacetate

Pricing Availability   Qty
Description: Cell permeable photostable nitric oxide (NO) fluorescent indicator
Chemical Name: 4-Amino-5-methylamino-2',7'-difluorofluorescein diacetate
Purity: ≥80% (HPLC)
Literature (1)

Biological Activity for DAF FM diacetate

DAF-FM DA is a cell-permeable fluorescent probe for the detection of intracellular nitric oxide (NO). Once inside the cell, it is hydrolyzed by cytosolic esterases to cell-impermeant DAF-FM. DAF-FM reacts with NO+ equivalents, such as nitric anhydride (N2O3), which are formed by autoxidation of NO. Under aerobic conditions, DAF-FM can rapidly and irreversibly trap NO to yield highly fluorescent triazolofluoresceins (DAF-Ts). DAF-FM DA is photostable and stable in pH 5.5 to 12. It can be used to quantitatively monitor agonist-evoked NO synthesis in cultured HUVECs. DAF-FM DA may also be used to quantify NO levels in induced pluripotent stem cell-derived derived cardiomyocytes (iPSC-CM).

It is recommended to prepare stock solutions in DMSO.

Optical Data for DAF FM diacetate

DAF FM diacetate Dye Spectra
Emission Color Green
λabs 495 nm
λem 515 nm
Extinction Coefficient (ε) 84000 M-1cm-1
Cell Permeable Yes
pH Sensitivity Independent of pH when pH >5.8
Application Confocal Microscopy, Flow cytometry

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Technical Data for DAF FM diacetate

M. Wt 496.42
Formula C25H18F2N2O7
Storage Store at -20°C
Purity ≥80% (HPLC)
CAS Number 254109-22-3
PubChem ID 2762646
Smiles O=C1OC2(C3=CC=C(C(N)=C13)NC)C4=CC(F)=C(C=C4OC5=CC(OC(C)=O)=C(C=C52)F)OC(C)=O

The technical data provided above is for guidance only. For batch specific data refer to the Certificate of Analysis.

Tocris products are intended for laboratory research use only, unless stated otherwise.

Product Datasheets for DAF FM diacetate

References for DAF FM diacetate

References are publications that support the biological activity of the product.

Kojima et al (1999) Fluorescent Indicators for Imaging Nitric Oxide Production. Angew.Chem.Int.Ed.Engl. 38 3209 PMID: 10556905

Sheng et al (2005) DAF-FM (4-amino-5-methylamino-2',7'-difluorofluorescein) diacetate detects impairment of agonist-stimulated nitric oxide synthesis by elevated glucose in human vascular endothelial cells: reversal by vitamin C and L-sepiapterin. J.Pharmacol.Exp.Ther. 315 931 PMID: 16093274

Almeida et al (2021) Sensing nitric oxide in cells: historical technologies and future outlook. ACS.Sens. 6 1695 PMID: 33871990

Xu et al (2022) Uncompensated mitochondrial oxidative stress underlies heart failure in an iPSC-derived model of congenital heart disease. Cell Stem Cell 29 840 PMID: 35395180

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Fluorescent Dyes and Probes Research Product Guide

Fluorescent Dyes and Probes Research Product Guide

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