3326-34-9 4-Aminofluorescein 6-amino-3',6'-dihydroxy-spiro[isobenzofuran-3,9'-xanthene]-1-one Fluorescein amine isomer 1 Fluorescein, 5-amino- Fluoresceinamine Isomer I Fluoresceinamine-I Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, 5-amino-3',6'-dihydroxy- CAS 3326-34-9

Purity 97%+In StockPharmaceutical Standards
CAS No.3326-34-9
Molecular FormulaC20H31NO5
Molecular Weight365.46 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

3326-34-9 4-Aminofluorescein 6-amino-3',6'-dihydroxy-spiro[isobenzofuran-3,9'-xanthene]-1-one Fluorescein amine isomer 1 Fluorescein, 5-amino- Fluoresceinamine Isomer I Fluoresceinamine-I Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, 5-amino-3',6'-dihydroxy- CAS 3326-34-9 chemical structure

Description

CATO manufactures 3326-34-9 4-Aminofluorescein 6-amino-3',6'-dihydroxy-spiro[isobenzofuran-3,9'-xanthene]-1-one Fluorescein amine isomer 1 Fluorescein, 5-amino- Fluoresceinamine Isomer I Fluoresceinamine-I Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, 5-amino-3',6'-dihydroxy- under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.

3326-34-9 4-Aminofluorescein 6-amino-3',6'-dihydroxy-spiro[isobenzofuran-3,9'-xanthene]-1-one Fluorescein amine isomer 1 Fluorescein, 5-amino- Fluoresceinamine Isomer I Fluoresceinamine-I Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, 5-amino-3',6'-dihydroxy- (CAS 3326-34-9) is a high-purity analytical reference standard with the molecular formula C20H31NO5 and a molecular weight of 365.46 g/mol.

Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, 3326-34-9 4-Aminofluorescein 6-amino-3',6'-dihydroxy-spiro[isobenzofuran-3,9'-xanthene]-1-one Fluorescein amine isomer 1 Fluorescein, 5-amino- Fluoresceinamine Isomer I Fluoresceinamine-I Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, 5-amino-3',6'-dihydroxy- is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 365.46 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).

This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.

Physical & Chemical Properties

Molecular FormulaC20H31NO5
Molecular Weight365.46 g/mol
AppearanceOff-white to pale yellow crystalline powder
Purity97%+
StorageStore at 2-8°C, protect from light, keep sealed and dry
Solubility (reference)Soluble in methanol, acetonitrile, DMSO, water (slightly soluble)
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)6.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1957
Nitrogen Atoms1

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