TAMRA maleimide, 6-isomer

For research use only. Not for therapeutic Use.

  • CAT Number: I036991
  • Molecular Formula: C31H28N4O6
  • Molecular Weight: 552.588
  • Purity: 98%
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TAMRA (aka TMR or tetramethylrhodamine) is a xanthene dye that has been used as a fluorescent label for decades. Xanthene dyes are available as two isomers (called 5- and 6-isomers) that have almost identical fluorescent properties, but need to be separated to avoid doubling and smearing of labeled product peaks or bands during chromatography or electrophoresis. This is a pure 6-isomer of TAMRA maleimide, used for the labeling of proteins and peptides via thiol (SH) groups


Catalog Number I036991
Molecular Formula C31H28N4O6
Purity 98%
Solubility Soluble in DMSO
Appearance Solid powder
Storage Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).
IUPAC Name 3',6'-bis(dimethylamino)-N-(2-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)ethyl)-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthene]-6-carboxamide
InChI InChI=1S/C31H28N4O6/c1-33(2)19-6-9-22-25(16-19)40-26-17-20(34(3)4)7-10-23(26)31(22)24-15-18(5-8-21(24)30(39)41-31)29(38)32-13-14-35-27(36)11-12-28(35)37/h5-12,15-17H,13-14H2,1-4H3,(H,32,38)
InChIKey LLYYNGSVFARFNI-UHFFFAOYSA-N
SMILES CN(C)C1=CC=C2C(OC(C=C(N(C)C)C=C3)=C3C2(C4=CC(C(NCCN5C(C=CC5=O)=O)=O)=CC=C46)OC6=O)=C1

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