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TCI

CAS 3326-34-9

5-Aminofluorescein (isomer I) TCI A0306

5-Aminofluorescein (isomer I) TCI A0306

Chemical Identity

CAS No.
3326-34-9
PubChem
CID 76845·SID 87561959
Formula
C20H13NO5
Molecular weight
347.3 g/mol
Purity
>95.0%(HPLC)(T)
Reference databases
ChEBI·ChemSpider·ECHA
Full identifiers (IUPAC, SMILES, InChIKey)
IUPAC
6-amino-3',6'-dihydroxyspiro[2-benzofuran-3,9'-xanthene]-1-one
SMILES
C1=CC2=C(C=C1N)C(=O)OC23C4=C(C=C(C=C4)O)OC5=C3C=CC(=C5)O
InChIKey
GZAJOEGTZDUSKS-UHFFFAOYSA-N
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5-Aminofluorescein (isomer I) (CAS 3326-34-9) is a high-quality chemical from TCI, supplied as HPLC Grade.

Application: Used as a fluorescent dye for biological labelling and bioimaging.

Specifications:

  • Molecular formula: C20H13NO5
  • CAS number: 3326-34-9
  • Purity: >95.0%(HPLC)(T)
  • TCI product code: A0306

Synonyms: 5-Amino-3',6'-dihydroxyspiro[isobenzofuran-1(3H),9'-(9H)xanthen]-3-one (isomer I); Fluoresceinamine (isomer I)

Available from AMI Scientific, the authorised TCI distributor in Indonesia. Contact us for pricing and stock availability — we ship throughout Indonesia.

Advantages (TCI brochure)

  • Green fluorescence
  • Labeled to carboxy groups by amide bond formation using a coupling agent

TCI brochures (PDF)

From the TCI brochure

  • Labeling of carboxy groups

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Data from the TCI brochure

λex,max494 nm
λem,max521 nm

Source: TCI brochure LL039 (2025-11-18)

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