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Fluorescein isothiocyanate isomer I

SIGMA/46951 - ≥97.5% (HPLC)

Synonym: FITC; Fluorescein 5-isothiocyanate

CAS Number: 3326-32-7
Empirical Formula (Hill Notation): C21H11NO5S
Molecular Weight: 389.38
EC Number: 222-042-0
MDL Number: MFCD00005063
Linear Formula: C21H11NO5S
Product Type: Chemical
Catalog Number PKG Qty. Price Quantity
45-46951-250MG-F 250 mg
 $669.00
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assay ≥97.5% (HPLC)
fluorescence λex 492 nm; λem 518 nm (green)
  λex 492 nm; λem 518 nm in 0.1 M phosphate pH 8.0
form powder
impurities ≤1.5% Isomer II
InChI 1S/C21H11NO5S/c23-12-2-5-16-18(8-12)26-19-9-13(24)3-6-17(19)21(16)15-4-1-11(22-10-28)7-14(15)20(25)27-21/h1-9,23-24H
InChI key MHMNJMPURVTYEJ-UHFFFAOYSA-N
mp >360 °C (lit.)
Quality Level 100 
SMILES string Oc1ccc2c(Oc3cc(O)ccc3C24OC(=O)c5cc(ccc45)N=C=S)c1
solubility acetone: soluble 0.1 g/10 mL
storage temp. 2-8°C
Application: Reagent for the FITC labeling of proteins; Microsequencing of proteins and peptides (HPLC)
Purity ≥97.5% (HPLC)
mp >360 °C (lit.)
Storage Temp. 2-8°C
UNSPSC 12171500

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