3-Methyl-isatoic anhydride 3-methylisatoic anhydride 66176-17-8 8-methyl-1-h-benzo[d][1,3]oxazine-2,4-dione 8-methyl-1h-benzo[d][1,3]oxazine-2,4-dione CAS 66176-17-8

Purity 97%+In StockPharmaceutical Standards
CAS No.66176-17-8
Molecular FormulaC9H5NO3
Molecular Weight175.14 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

3-Methyl-isatoic anhydride 3-methylisatoic anhydride 66176-17-8 8-methyl-1-h-benzo[d][1,3]oxazine-2,4-dione 8-methyl-1h-benzo[d][1,3]oxazine-2,4-dione CAS 66176-17-8 chemical structure

Description

Compared with other compounds in its class, the molecular weight of 175.14 g/mol gives 3-Methyl-isatoic anhydride 3-methylisatoic anhydride 66176-17-8 8-methyl-1-h-benzo[d][1,3]oxazine-2,4-dione 8-methyl-1h-benzo[d][1,3]oxazine-2,4-dione distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

3-Methyl-isatoic anhydride 3-methylisatoic anhydride 66176-17-8 8-methyl-1-h-benzo[d][1,3]oxazine-2,4-dione 8-methyl-1h-benzo[d][1,3]oxazine-2,4-dione (CAS 66176-17-8), molecular formula C9H5NO3 and molecular weight 175.14 g/mol, is a CATO reference standard with documented purity and traceability.

Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, 3-Methyl-isatoic anhydride 3-methylisatoic anhydride 66176-17-8 8-methyl-1-h-benzo[d][1,3]oxazine-2,4-dione 8-methyl-1h-benzo[d][1,3]oxazine-2,4-dione is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 175.14 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

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 FormulaC9H5NO3
Molecular Weight175.14 g/mol
AppearancePale yellow to yellow crystalline powder. (faint amine-like odor)
Purity97%+
StorageStore at 2-8°C, protect from light, keep sealed and dry
Solubility (reference)Soluble in methanol, ethanol, DMSO
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening
Degree of Unsaturation (DBE)8.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1975
Nitrogen Atoms1

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