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Home - News - Is Para-Dichlorobenzene (PDCB / Para-Dichlorobenzene) a carcinogen?

Is Para-Dichlorobenzene (PDCB / Para-Dichlorobenzene) a carcinogen?

November 27, 2025

Is paradichlorobenzene a carcinogen in industrial and consumer applications, and how should buyers assess the risk when sourcing it globally?

Para-Dichlorobenzene (PDCB) is classified by the World Health Organization (WHO) as "possibly carcinogenic to humans (Group 2B)" based on rodent studies, especially those involving mice. This classification does not confirm that it is a direct carcinogen in humans but signals that cancer observed in mice could theoretically arise through similar biological pathways in humans under certain exposure conditions. In industrial or commercial use, the risk is strongly dependent on dosage, duration, inhalation or skin exposure intensity, and workplace safety controls. When handled under proper industrial safety practices—such as ventilation, personal protective equipment (PPE), and controlled environments—PDCB remains a widely accepted chemical for deodorizing, moth repellents, disinfectant blocks, air fresheners, and chemical intermediate manufacturing.

For international B2B buyers—especially in Brazil, Mexico, Peru, Pakistan, Colombia, the United States, and other emerging manufacturing economies—assessing carcinogenic risk is only part of the sourcing checklist. The actual procurement pain points often revolve around inconsistent purity, uncontrolled sublimation properties, residual chlorine or benzene by-products, lack of regulatory compliance support (SDS, Reach status, TSCA inventory, Anvisa-related documentation for Brazil, or NOM compliance for Mexico), and shipping safety concerns for solid subliming chemicals. For example, manufacturers of air freshener tablets in Mexico and Peru prioritize stable sublimation rates and odor profile consistency. In Pakistan and Brazil, buyers place heavier focus on technical reliability and strict impurity thresholds due to downstream formulation sensitivity. In the U.S. and Colombia, importers often emphasize logistics security, compliance transparency, and long-term supply stability over one-time low pricing.

At Wuxi High Mountain Hi-tech Development Co.,Ltd., PDCB is produced with a strong focus on high purity, controlled sublimation behavior, and full regulatory traceability. As a diversified high-tech enterprise integrating production, R&D, and global distribution, we support buyers far beyond the chemical itself—we provide end-to-end procurement confidence. Our advantages include:
Purity stability above industry average, supported by rigorous batch consistency control.
Customizable sublimation specification tuning, ensuring compatibility for deodorant blocks, repellent tablets, or industrial chemical intermediates.
Compliance documentation readiness, including SDS, certification alignment, export packaging standards, and global market regulatory filing assistance.
Deep export experience in Latin America and South Asia, particularly Brazil, Peru, Mexico, Colombia, and Pakistan—allowing us to understand impurity limits, labeling expectations, freight constraints, and seasonal demand fluctuations.
Reliable logistics for subliming chemical solids, preventing material loss and ensuring safe delivery through reinforced export-grade sealing and moisture-controlled containers. We speak the language of global chemical purchasing—balancing safety, performance, and long-term stability to reduce buyer risk rather than adding complexity to it.

In summary, PDCB is considered possibly carcinogenic under theoretical long-term exposure, but it continues to be safe and effective when sourced and handled correctly within industrial safety frameworks. The real sourcing risk for global buyers is less about classification labels and more about product purity volatility, documentation compliance gaps, and logistics instability. Wuxi High Mountain Hi-tech Development Co.,Ltd. has positioned itself as a dependable long-term partner, with stable product performance, regulatory transparency, and strong international supply chain integration. If you're searching for a trusted PDCB supplier that prioritizes purity, safety, and global market support, High Mountain offers a proven combination of technical control and export reliability to protect your production and procurement success.