Description

1,2,4,7,9-Pncdf CAS NO 71998-74-8 is a high-purity, specialized polychlorinated dibenzofuran (PCDF) congener, a critical reference standard and research chemical. This compound is essential for analytical calibration, environmental monitoring, and toxicological studies due to its role as a persistent organic pollutant (POP). It is primarily required by analytical laboratories, regulatory agencies, and research institutions focused on dioxin analysis, environmental fate studies, and compliance testing for food and feed safety.

Application

• Analytical Reference Standard: Primary use as a certified calibration standard for high-resolution gas chromatography/mass spectrometry (HRGC/HRMS) analysis of dioxins and furans.
• Environmental Monitoring: Quantification and source tracking in soil, sediment, water, and air samples to assess contamination levels and comply with international POPs regulations.
• Food and Feed Safety Analysis: Critical for testing and ensuring compliance with maximum residue levels (MRLs) in foodstuffs, animal feed, and edible oils.
• Toxicological Research: Used in studies to investigate the congener-specific toxicity, bioaccumulation, and metabolic pathways of PCDFs.
• Quality Control & Method Validation: Serves as a spike/recovery standard and system suitability check in accredited laboratory quality assurance programs.
• Waste and Emission Testing: Analysis of industrial emissions, incineration fly ash, and chemical waste to monitor and control dioxin release.

Basic Information

Product Name	1,2,4,7,9-Pncdf
CAS No.	71998-74-8
Molecular Formula	C₁₂H₃Cl₅O
Molecular Weight	340.41 g/mol
Synonyms	1,2,4,7,9-Pentachlorodibenzofuran; Pentachlorodibenzofuran (1,2,4,7,9-); 1,2,4,7,9-PentaCDF; PCDF (1,2,4,7,9-); Dibenzofuran, 1,2,4,7,9-pentachloro-; 2,3,4,7,8-Pentachlorodibenzofuran (isomer); Contact for additional identifiers.
EINECS	Contact for details

Quality Control

Every batch of 1,2,4,7,9-Pncdf is manufactured and handled under strict quality protocols to ensure identity, purity, and stability. Our products undergo rigorous quality testing, including confirmatory analysis by GC-MS and HPLC, to ensure compliance with industry standards for reference materials. Comprehensive Certificates of Analysis (COA) detailing batch-specific purity, chromatographic data, and storage conditions are provided to support your traceability and compliance requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at recommended temperatures of -20°C to -10°C for long-term stability. Allow the sealed vial to equilibrate to room temperature before opening to prevent moisture condensation. Store away from strong oxidizers and incompatible materials.

Specification

Item	Specification
Appearance	White to off-white solid / Neat crystalline material
Identification (IR)	Conforms to structure
Identification (GC-MS)	Conforms to structure
Purity (HPLC)	≥ 98.0% (area percent)
Purity (GC)	≥ 98.0% (area percent)
Solvent (if applicable)	Specified on COA
Concentration (if in solution)	Specified on COA

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