Description

Paraxanthine-1-Methyl-D3 is a stable isotope-labeled analog of paraxanthine, a primary metabolite of caffeine. This deuterated compound is essential for use as an internal standard in quantitative mass spectrometry, ensuring analytical accuracy and precision. It is primarily required by pharmaceutical R&D laboratories, clinical research organizations, and forensic toxicology labs conducting advanced pharmacokinetic, metabolic, and doping control studies.

Application

• Mass Spectrometry Internal Standard: Critical for the accurate quantification of paraxanthine and caffeine in biological matrices (plasma, serum, urine) via LC-MS/MS and GC-MS.
• Pharmacokinetic & Drug Metabolism Studies: Enables precise tracking of caffeine metabolism, half-life determination, and enzyme activity (CYP1A2) assessment in clinical trials.
• Forensic & Doping Control Analysis: Used in anti-doping laboratories to reliably detect and quantify caffeine and its metabolites in athlete samples.
• Biomedical Research: Supports in vitro and in vivo studies investigating the physiological effects, neuropharmacology, and metabolic pathways of methylxanthines.
• Diagnostic Assay Development: Serves as a key calibrant in the development and validation of high-sensitivity clinical diagnostic tests.

Basic Information

Product Name	Paraxanthine-1-Methyl-D3
CAS No.	188297-90-7
Molecular Formula	C8H7D3N4O2
Molecular Weight	181.19 g/mol
Synonyms	1,7-Dimethylxanthine-1-methyl-d3; 1-Methyl-d3-paraxanthine; 1,7-Dimethyl-3H-purine-2,6-dione-1-methyl-d3; 1,7-Dimethyl-1-methyl-d3-xanthine; Paraxanthine-d3 (methyl-labeled); [1-Methyl-d3]-1,7-dimethylxanthine; 3,7-Dihydro-1,7-dimethyl-1-methyl-d3-3H-purine-2,6-dione
EINECS	Contact for details

Quality Control

Our Paraxanthine-1-Methyl-D3 is manufactured under strict quality systems to ensure the high chemical purity and isotopic enrichment required for analytical applications. Each batch is supported by a comprehensive Certificate of Analysis (COA) detailing parameters such as isotopic purity (D-enrichment), chemical purity by HPLC, and identity confirmation. We adhere to relevant standards for high-purity reference materials.

Storage

Preserve in a tightly closed container, protected from light. Store at controlled room temperature (15-25°C) in a dry environment. The product is light-sensitive and should be handled accordingly to maintain stability.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Isotopic Purity (D-enrichment)	≥ 98 atom % D
Chemical Purity (HPLC)	≥ 99.0%
Water Content (KF)	≤ 0.5%
Residue on Ignition	≤ 0.1%

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