AF488 carboxylic acid

Cat. # Quantity Price Lead time
11890 1 mg $110.00 in stock
21890 5 mg $290.00 in stock
41890 25 mg $690.00 in stock
51890 50 mg $1270.00 in stock
61890 100 mg please inquire 21 days

AF488 is a bright green-fluorescent dye that is commonly used in microscopy and cell assays because of its photostability. AF488 can be used with DAPI and is well suited to multiplex assay. This high quantum yield dye has fluorescence stability within the pH range from 4 to 10.

AF488 carboxylic acid is a non-reactive AF488 form that can be used as a reference standard in experiments where AF488 conjugates are used. The carboxylic acid can be also used for the synthesis of activated esters [such as sulfo-NHS, TFP (2,3,5,6-tetrafluorophenol) and STP (4-sulfo-2,3,5,6-tetrafluorophenol)] or modified with hydrazines, hydroxylamines, or amines in aqueous solutions using water-soluble carbodiimides. Thus, this derivative can be conjugated to molecules that contain amino groups, such as proteins, antibodies, and peptides. Therefore, AF488 carboxylic acid is used during solid-phase peptide synthesis for peptide modification in situ in the presence of activating agents such as HATU.

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AF488 NHS ester

AF488 NHS ester, a bright, photostable and hydrophilic fluorescent dye for green channel.

AF568 carboxylic acid

Non-reactive form of AF568 fluorescent dye

General properties

Appearance: orange crystals
Molecular weight: 648.74
Molecular formula: C21H11N2K3O11S2
IUPAC name: 4-(6-amino-3-iminio-4,5-disulfonato-3H-xanthen-9-yl)isophthalate
Solubility: good in DMSO, DMF
Quality control: NMR 1H, HPLC-MS (95%)
Storage conditions: Storage: 12 months after receival at -20°C in the dark. Transportation: at room temperature for up to 3 weeks. Avoid prolonged exposure to light.
MSDS: Download
Product specifications

Spectral properties

Excitation/absorption maximum, nm: 495
ε, L⋅mol−1⋅cm−1: 71800
Emission maximum, nm: 519
Fluorescence quantum yield: 0.91
CF260: 0.16
CF280: 0.10
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