Description

Pcb 138-13C12 CAS NO 208263-66-5 is a stable isotope-labeled analog of PCB-138, a persistent environmental contaminant and member of the polychlorinated biphenyl family. This carbon-13 labeled internal standard is essential for achieving high-precision quantification and reliable data in advanced analytical workflows. It is a critical reagent for environmental testing laboratories, regulatory agencies, and research institutions conducting trace-level analysis of PCBs in complex matrices.

Application

• Internal Standard for GC-MS/MS and HRGC/HRMS Analysis: Used for the accurate quantification of native PCB-138 in environmental, food, and biological samples.
• Method Development and Validation: Serves as a key component in establishing and validating analytical methods according to EPA, EU, and other international standards.
• Quality Assurance/Quality Control (QA/QC): Employed in laboratory proficiency testing, recovery studies, and as a system performance check.
• Environmental Monitoring: Critical for analyzing soil, sediment, water, and air samples to assess contamination levels and track pollutant fate.
• Food and Feed Safety Testing: Enables precise measurement of PCB residues to ensure compliance with maximum residue limits (MRLs).
• Biomedical and Toxicological Research: Used in studies investigating the bioaccumulation, metabolism, and health effects of PCBs.

Basic Information

Product Name	Pcb 138-13C12
CAS No.	208263-66-5
Molecular Formula	C13C12H6Cl6
Molecular Weight	~375.89 (for 13C12 labeled)
Synonyms	2,2',3,4,4',5'-Hexachlorobiphenyl-13C12; PCB 138-13C12; IUPAC Name: 2,2',3,4,4',5'-Hexachloro-1,1'-biphenyl-13C12; BZ# 138-13C12; Congener 138-13C12; 13C12-Labeled PCB 138; Isotopically Labeled PCB-138
EINECS	Contact for details

Quality Control

Our stable isotope-labeled standards are produced and controlled to meet the exacting requirements of analytical reference materials. Each batch is characterized using advanced techniques including high-resolution mass spectrometry (HRMS) and nuclear magnetic resonance (NMR) to confirm isotopic enrichment and chemical purity. Certificates of Analysis (COA) are provided, detailing batch-specific data on chemical purity, isotopic purity, and concentration. Our quality system supports compliance with ISO 17034 guidelines for reference material producers.

Storage

Preserve in a tightly closed container, protected from light. Store at -20°C or below in a dedicated freezer. Allow the sealed vial to equilibrate to room temperature before opening to prevent moisture condensation. For long-term stability, store under inert atmosphere.

Specification

Item	Specification
Appearance	Colorless to pale yellow solution or solid
Identification (NMR/MS)	Conforms to structure
Chemical Purity (GC)	≥ 98%
Isotopic Purity (13C12)	≥ 99 atom % 13C
Isotopic Enrichment	≥ 99%
Concentration (if in solution)	10 µg/mL ± 5% in nonane or iso-octane
Solvent (if applicable)	Certified pesticide/PCB grade

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