Description

Sulfamethazine (Phenyl-13C6, 99%) is a stable isotope-labeled analog of the common sulfonamide antibiotic, where the phenyl ring is uniformly labeled with carbon-13. This high-purity standard is essential for creating precise and reliable quantitative measurements in advanced analytical techniques. It is primarily utilized by researchers and quality control laboratories in the pharmaceutical, environmental, and food safety sectors for method development, validation, and as an internal standard for mass spectrometry.

Application

• Internal standard for the quantitative analysis of sulfamethazine and related sulfonamides via LC-MS/MS and GC-MS.
• Critical reagent in pharmaceutical research for studying drug metabolism, pharmacokinetics (DMPK), and bioanalytical method development.
• Use in veterinary drug residue testing for ensuring food safety in meat, milk, and other animal products.
• Preparation of certified reference materials (CRMs) and calibration standards for regulatory compliance testing.
• Application in environmental monitoring to trace antibiotic contamination in water and soil samples.
• Tool for isotopic dilution mass spectrometry (IDMS) to achieve the highest accuracy in concentration measurements.

Basic Information

Product Name	Sulfamethazine (Phenyl-13C6, 99%)
CAS No.	77643-91-5
Molecular Formula	C13C6H14N4O2S
Molecular Weight	284.31 (for 13C6 labeled form)
Synonyms	4-Amino-N-(4,6-dimethyl-2-pyrimidinyl)benzenesulfonamide (Phenyl-13C6); Sulfadimidine-13C6 (phenyl ring); [Phenyl-13C6]-Sulfamethazine; 13C6-Sulfamethazine; Isotopically Labeled Sulfamethazine; Sulfamethazine-13C6; Internal Standard for Sulfadimidine
EINECS	Contact for details

Quality Control

Every batch of our Sulfamethazine (Phenyl-13C6, 99%) is manufactured and analyzed under strict quality systems. The product undergoes rigorous testing, including NMR and mass spectrometry, to confirm isotopic enrichment and chemical purity. A comprehensive Certificate of Analysis (COA) detailing isotopic purity (≥99% 13C6), chemical purity, and analytical results is provided with each shipment to ensure traceability and compliance with your research or quality standards.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at controlled room temperature (15-25°C). This compound is hygroscopic (moisture-sensitive); keep the container tightly sealed in a desiccated environment to maintain stability and purity.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
Isotopic Purity (13C6)	≥ 99%
Chemical Purity (HPLC)	≥ 98%
Water Content (KF)	≤ 1.0%
Residue on Ignition	≤ 0.1%

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