Description

1,2,4,7-Tetrachlorodibenzo[1,4]Dioxin CAS NO 71669-28-8 is a specific chlorinated derivative of dibenzo-p-dioxin, a class of compounds of significant interest in environmental and analytical chemistry. Its precise structure makes it a critical reference standard for research and regulatory analysis. This compound is primarily required by analytical laboratories, environmental testing facilities, and research institutions focused on persistent organic pollutants (POPs). It serves as an essential tool for method development, calibration, and quality control in trace-level dioxin analysis.

Application

• Environmental Analysis Reference Standard: Used as a certified reference material (CRM) for the quantification of polychlorinated dibenzo-p-dioxins (PCDDs) in soil, water, air, and biological samples.
• Analytical Method Development: Essential for developing and validating high-resolution gas chromatography/mass spectrometry (HRGC/HRMS) methods for dioxin congener-specific analysis.
• Laboratory Quality Assurance/Quality Control (QA/QC): Serves as a spike or internal standard to monitor analytical recovery, accuracy, and precision in compliance with EPA Method 1613 and other international protocols.
• Toxicological and Ecotoxicological Research: Used in studies investigating the structure-activity relationships, environmental fate, and toxicological profiles of specific dioxin congeners.
• Regulatory Compliance Testing: Employed by commercial testing laboratories to ensure analytical data meets the stringent requirements of global regulations concerning POPs (e.g., Stockholm Convention, EU directives).
• Calibration of Instrumentation: Used to prepare calibration curves for sensitive detection systems, ensuring reliable and traceable measurement results.

Basic Information

Product Name	1,2,4,7-Tetrachlorodibenzo[1,4]Dioxin
CAS No.	71669-28-8
Molecular Formula	C₁₂H₄Cl₄O₂
Molecular Weight	321.97 g/mol
Synonyms	1,2,4,7-Tetrachlorodibenzo-p-dioxin; 1,2,4,7-TeCDD; TCDD (isomer-specific); Tetrachlorodibenzodioxin; PCDD (congener-specific); Dibenzo[1,4]dioxin, 1,2,4,7-tetrachloro-; 71669-28-8; 1,2,4,7-Tetrachlorodibenzo[b,e][1,4]dioxin
EINECS	Contact for details

Quality Control

Our high-purity analytical standards are produced and handled under strict quality-controlled conditions to ensure identity, purity, and stability. Each batch is accompanied by a comprehensive Certificate of Analysis (COA) providing lot-specific data from multiple orthogonal analytical techniques. We ensure traceability and compliance with relevant guidelines for reference materials. Certificates of Analysis (COA) are available upon request and are essential for your QA/QC documentation.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). This product is light-sensitive (store away from light). For long-term storage, consider storage at -20°C under inert atmosphere to maximize stability. Keep the container sealed to prevent contamination and moisture uptake.

Specification

Item	Specification
Appearance	White to off-white solid
Identification (IR)	Conforms to structure
Identification (GC/MS)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Solubility	Soluble in common organic solvents (e.g., toluene, DMSO)

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