Description

6-Chloro-3,4-Dihydro-4-Methyl-3-Oxo-2H-1,4-Benzoxazine-8-Carboxylic Acid-13C,D3 Methyl Ester is a high-purity, isotopically labeled derivative of a benzoxazine carboxylic acid scaffold, designed for advanced analytical and research applications. This compound matters because it provides the internal standard specificity and sensitivity required for precise quantitative analysis in complex matrices, ensuring data integrity and regulatory compliance. It is essential for pharmaceutical researchers, analytical chemists, and contract research organizations (CROs) engaged in method development, pharmacokinetic studies, and metabolite identification.

Application

• Internal Standard for LC-MS/MS: Primary application as a stable isotope-labeled internal standard (SIL-IS) for the accurate quantification of parent drug compounds or metabolites in biological samples (plasma, serum, urine).
• Pharmaceutical R&D: Critical tool in drug discovery and development for conducting Absorption, Distribution, Metabolism, and Excretion (ADME) studies and bioanalytical method validation.
• Metabolite Profiling: Used in mass spectrometry to differentiate between drug-derived and endogenous compounds, facilitating the identification and structural elucidation of metabolites.
• Clinical Trial Support: Enables reliable and GLP-compliant analysis of drug concentrations in patient samples during clinical phases.
• Forensic & Doping Analysis: Supports high-confidence detection and quantification of specific substances in forensic toxicology and anti-doping programs.
• Environmental Fate Studies: Can be employed as a tracer to study the environmental degradation and transformation pathways of analogous chemical compounds.

Basic Information

Product Name	6-Chloro-3,4-Dihydro-4-Methyl-3-Oxo-2H-1,4-Benzoxazine-8-Carboxylic Acid-13C,D3 Methyl Ester
CAS No.	1329634-37-8
Molecular Formula	C1013CH4D3ClNO4
Molecular Weight	~258.68 g/mol
Synonyms	6-Chloro-4-methyl-3-oxo-3,4-dihydro-2H-1,4-benzoxazine-8-carboxylic-13C acid methyl-d3 ester; Methyl 6-chloro-4-methyl-3-oxo-3,4-dihydro-2H-1,4-benzoxazine-8-carboxylate-13C,d3; 13C,D3-Labeled Benzoxazine Carboxylic Acid Methyl Ester; 6-Chloro-4-methyl-2H-1,4-benzoxazine-3(4H)-one-8-carboxylic-13C acid methyl-d3 ester; SIL-IS for Benzoxazine Analogs; [13C,D3]-Methyl 6-chloro-4-methyl-3-oxo-3,4-dihydro-2H-benzo[b][1,4]oxazine-8-carboxylate
EINECS	Contact for details

Quality Control

Our isotopically labeled compounds are manufactured under strict quality systems to ensure exceptional chemical and isotopic purity. Each batch undergoes comprehensive analysis including HPLC for chemical purity, NMR and MS for structural and isotopic confirmation, and residual solvent analysis. Certificates of Analysis (COA) detailing lot-specific data for purity, isotopic enrichment (typically >99% atom 13C and >98% atom D), and identity are provided to support your regulatory and research documentation needs.

Storage

Preserve in a tightly closed container, protected from light. Store at -20°C or below for long-term stability. This product is hygroscopic (moisture-sensitive). Allow the sealed vial to equilibrate to room temperature before opening to minimize moisture uptake.

Specification

Item	Specification
Appearance	White to off-white solid
Identification (IR)	Conforms to structure
Identification (MS)	Conforms to structure
Purity (HPLC)	≥98.0%
Isotopic Purity (13C)	≥99.0 atom %
Isotopic Purity (D)	≥98.0 atom %
Water Content (KF)	≤0.5%
Residual Solvents (GC)	Complies with ICH guidelines

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.