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Cat.No. 5440 - FITC | C21H11NO5S | CAS No. 3326-32-7
Description: Green fluorescent dye; supplied as NHS ester
Alternative Names: Fluorescein-5-Isothiocyanate, FITC Isomer 1
Chemical Name: 3',6'-Dihydroxy-5-isothiocyanatospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one
Purity: ≥98% (HPLC)
Citations (1)

Biological Activity

Fluorescent reagent for the labeling of amines. Excitation maximum ~ 495 nm; emission maximum ~ 525 nm.

Technical Data

M. Wt 389.38
Formula C21H11NO5S
Storage Store at -20°C
Purity ≥98% (HPLC)
CAS Number 3326-32-7
PubChem ID 18730
Smiles OC1=CC=C(C2(C(C=CC(N=C=S)=C3)=C3C(O2)=O)C(C=CC(O)=C4)=C4O5)C5=C1

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.

Solubility Data

Solvent Max Conc. mg/mL Max Conc. mM
ethanol 7.79 20
DMSO 38.94 100

Preparing Stock Solutions

The following data is based on the product molecular weight 389.38. Batch specific molecular weights may vary from batch to batch due to solvent of hydration, which will affect the solvent volumes required to prepare stock solutions.

Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 2.57 mL 12.84 mL 25.68 mL
5 mM 0.51 mL 2.57 mL 5.14 mL
10 mM 0.26 mL 1.28 mL 2.57 mL
50 mM 0.05 mL 0.26 mL 0.51 mL

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

Yang et al (2014) A novel CXCR4-selective high-affinity fluorescent probe and its application in competitive binding assays. Biochemistry 53 4881 PMID: 25058910

If you know of a relevant reference for FITC, please let us know.

View Related Products by Target

Keywords: FITC, FITC supplier, fluorescent, reagents, labeling, amines, Fluorescein-5-Isothiocyanate, Isomer1, dyes, FITC, Isomer, 1, Other, Fluorescent, Dyes, 5440, Tocris Bioscience

1 Citation for FITC

Citations are publications that use Tocris products. Selected citations for FITC include:

Meyer et al (2012) Lipidic nanocapsule drug delivery: neuronal protection for cochlear implant optimization. Int J Nanomedicine 7 2449 PMID: 22654517

Do you know of a great paper that uses FITC from Tocris? Please let us know.

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Literature in this Area

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New Product Guide (Fall/Winter 2018/2019)

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