Description

1,2,3,9-Tetrachlorodibenzo[1,4]Dioxin CAS NO 71669-26-6 is a specific chlorinated derivative of dibenzo-p-dioxin, a compound class of significant interest in environmental and analytical chemistry. This high-purity reference standard is critical for research, method development, and quality control in laboratories focused on persistent organic pollutant (POP) analysis. It is primarily required by environmental testing facilities, regulatory bodies, and chemical research institutions for precise calibration and quantification in complex matrices.

Application

• Environmental Analysis Reference Standard: Primary use as a certified reference material (CRM) for the calibration of analytical instruments (GC-MS, HRGC/HRMS) in the detection of polychlorinated dibenzo-p-dioxins (PCDDs).
• Method Development and Validation: Essential for developing, optimizing, and validating analytical methods according to EPA, EU, and other international standards for dioxin testing.
• Quality Assurance/Quality Control (QA/QC): Used in laboratory proficiency testing, spike/recovery studies, and as an internal standard to ensure accuracy and precision in trace-level analysis.
• Toxicological and Environmental Fate Studies: Serves as a specific congener for scientific research investigating the environmental behavior, distribution, and toxicological profiles of chlorinated dioxins.
• Regulatory Compliance Testing: Supports testing of industrial emissions, waste, soil, water, and food/feed samples to ensure compliance with strict global regulations on dioxin levels.

Basic Information

Product Name	1,2,3,9-Tetrachlorodibenzo[1,4]Dioxin
CAS No.	71669-26-6
Molecular Formula	C12H4Cl4O2
Molecular Weight	307.97 g/mol
Synonyms	1,2,3,9-Tetrachlorodibenzo-p-dioxin; 1,2,3,9-TeCDD; Tetrachlorodibenzodioxin (1,2,3,9- isomer); NSC 89292; Dibenzo[b,e][1,4]dioxin, 1,2,3,9-tetrachloro-; 1,2,3,9-TCDD
EINECS	Contact for details

Quality Control

Our high-purity analytical standards are produced and verified under strict quality management protocols. Each batch is characterized using advanced analytical techniques including gas chromatography-mass spectrometry (GC-MS) and high-resolution mass spectrometry (HRMS) to confirm identity and purity. A comprehensive Certificate of Analysis (COA) is supplied with each product, detailing batch-specific data on purity, concentration, and analytical methods. We support compliance with ISO/IEC 17025 and relevant EPA methodologies.

Storage

Preserve in a tightly closed container, protected from light. Store at 2-8°C (refrigerated) or as indicated on the product label or COA. For long-term storage, keep at -20°C under an inert atmosphere. Allow the sealed vial to equilibrate to room temperature before opening to prevent moisture condensation.

Specification

Item	Specification
Appearance	White to off-white solid or solution (as specified)
Identification (IR / MS)	Conforms to reference spectrum
Purity (GC-MS / HRGC-HRMS)	≥ 98.0% (Area Percent)
Concentration (if in solution)	10 µg/mL ± 5% in nonane, toluene, or as specified
Related Substances (HPLC / GC)	Individual impurity ≤ 1.0%; Total impurities ≤ 2.0%
Water Content (KF)	≤ 0.5%

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