5-Aminofluorescein 5-amino-3',6'-dihydroxy-spiro[isobenzofuran-3,9'-xanthene]-1-one 51649-83-3 Fluorescein amine II Fluorescein amine isomer II Fluorescein, 6-amino- (7CI) Fluoresceinamine Isomer II Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, 6-amino-3',6'-dihydroxy- CAS 51649-83-3

Purity 97%+In StockPharmaceutical Standards
CAS No.51649-83-3
Molecular FormulaC20H31NO5
Molecular Weight365.46 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

5-Aminofluorescein 5-amino-3',6'-dihydroxy-spiro[isobenzofuran-3,9'-xanthene]-1-one 51649-83-3 Fluorescein amine II Fluorescein amine isomer II Fluorescein, 6-amino- (7CI) Fluoresceinamine Isomer II Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, 6-amino-3',6'-dihydroxy- CAS 51649-83-3 chemical structure

Description

5-Aminofluorescein 5-amino-3',6'-dihydroxy-spiro[isobenzofuran-3,9'-xanthene]-1-one 51649-83-3 Fluorescein amine II Fluorescein amine isomer II Fluorescein, 6-amino- (7CI) Fluoresceinamine Isomer II Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, 6-amino-3',6'-dihydroxy- (CAS 51649-83-3) is a high-purity pharmaceutical standards reference standard from CATO, an ISO 17034 accredited reference material producer. Molecular formula: C20H31NO5. Molecular weight: 365.46 g/mol. Each batch is supplied with a Certificate of Analysis (COA).

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.)1971
Nitrogen Atoms1

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