QJH0DSQ3SG 548-54-9 Violacein 2-Indolinone, 3-(2-(5-hydroxyindol-3-yl)-5-oxo-2-pyrrolin-4-ylidene)- 4-26-00-00715 (Beilstein Handbook Reference) BRN 0049923 3-(2-(5-Hydroxyindol-3-yl)-5-oxo-2-pyrrolin-4-ylidene)-2-indolinone Oxindole, 3-(2-(5-hydroxyindol-3-yl)-5-oxo-2-pyrrolin-4-ylidene)- (6CI) UNII-QJH0DSQ3SG CAS 548-54-9

Purity 97%+In StockPharmaceutical Standards
CAS No.548-54-9
Molecular FormulaC20H13N3O3
Molecular Weight343.34 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

QJH0DSQ3SG 548-54-9 Violacein 2-Indolinone, 3-(2-(5-hydroxyindol-3-yl)-5-oxo-2-pyrrolin-4-ylidene)- 4-26-00-00715 (Beilstein Handbook Reference) BRN 0049923 3-(2-(5-Hydroxyindol-3-yl)-5-oxo-2-pyrrolin-4-ylidene)-2-indolinone Oxindole, 3-(2-(5-hydroxyindol-3-yl)-5-oxo-2-pyrrolin-4-ylidene)- (6CI) UNII-QJH0DSQ3SG CAS 548-54-9 chemical structure

Description

The molecular framework of QJH0DSQ3SG 548-54-9 Violacein 2-Indolinone, 3-(2-(5-hydroxyindol-3-yl)-5-oxo-2-pyrrolin-4-ylidene)- 4-26-00-00715 (Beilstein Handbook Reference) BRN 0049923 3-(2-(5-Hydroxyindol-3-yl)-5-oxo-2-pyrrolin-4-ylidene)-2-indolinone Oxindole, 3-(2-(5-hydroxyindol-3-yl)-5-oxo-2-pyrrolin-4-ylidene)- (6CI) UNII-QJH0DSQ3SG (C20H13N3O3) is characterized by a steroid core, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).

QJH0DSQ3SG 548-54-9 Violacein 2-Indolinone, 3-(2-(5-hydroxyindol-3-yl)-5-oxo-2-pyrrolin-4-ylidene)- 4-26-00-00715 (Beilstein Handbook Reference) BRN 0049923 3-(2-(5-Hydroxyindol-3-yl)-5-oxo-2-pyrrolin-4-ylidene)-2-indolinone Oxindole, 3-(2-(5-hydroxyindol-3-yl)-5-oxo-2-pyrrolin-4-ylidene)- (6CI) UNII-QJH0DSQ3SG (CAS 548-54-9), molecular formula C20H13N3O3 and molecular weight 343.34 g/mol, is a CATO reference standard with documented purity and traceability.

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.

The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.

Physical & Chemical Properties

Molecular FormulaC20H13N3O3
Molecular Weight343.34 g/mol
AppearancePale yellow to yellow crystalline powder
Purity97%+
StorageStore at 2-8°C, protect from light, keep sealed and dry
Solubility (reference)Soluble in DMSO, DMF, methanol
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)16.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1957
Nitrogen Atoms3

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