3-Oxo-3',6'-bis(pivaloyloxy)-3H-spiro[isobenzofuran-1,9'-xanthene]-6-carboxylic acid CAS 192374-17-7

Purity 97%+In StockPharmaceutical Standards
CAS No.192374-17-7
Molecular FormulaC31H28O9
Molecular Weight544.55 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

3-Oxo-3',6'-bis(pivaloyloxy)-3H-spiro[isobenzofuran-1,9'-xanthene]-6-carboxylic acid CAS 192374-17-7 chemical structure

Description

3-Oxo-3',6'-bis(pivaloyloxy)-3H-spiro[isobenzofuran-1,9'-xanthene]-6-carboxylic acid (CAS 192374-17-7), molecular formula C31H28O9 and molecular weight 544.55 g/mol, is a CATO reference standard with documented purity and traceability.

Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system, 3-Oxo-3',6'-bis(pivaloyloxy)-3H-spiro[isobenzofuran-1,9'-xanthene]-6-carboxylic acid is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 544.55 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.

As a certified reference material (CRM), 3-Oxo-3',6'-bis(pivaloyloxy)-3H-spiro[isobenzofuran-1,9'-xanthene]-6-carboxylic acid meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.

Physical & Chemical Properties

Molecular FormulaC31H28O9
Molecular Weight544.55 g/mol
AppearancePale yellow to yellow crystalline powder
Purity97%+
StorageStore at room temperature, 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)18.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)2011

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