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Product Name: 2,3,4,7,8-Pentachlorodibenzofuran
Chemical Formula: C12H3Cl5O
Common Synonyms: PCDF, pentachlorinated dibenzofuran
CAS Number: 51207-31-9
Recommended Uses: Analytical research, toxicology studies
Supplier Details: Manufacturer and lab distributor contact numbers, emergency hotlines provided on request
GHS Classification: Acute Toxicity (Oral, Dermal, Inhalation): Category 2; Skin Sensitizer: Category 1; Carcinogenicity: Category 1B; Hazardous to Aquatic Environment: Very toxic, Acute Category 1/Chronic Category 1
Signal Word: Danger
Hazard Statements: Fatal if swallowed, inhaled or absorbed through skin; may cause cancer; causes skin irritation; causes serious eye irritation; very toxic to aquatic life with long lasting effects
Pictograms: Skull and crossbones, Health hazard, Exclamation mark, Environment
Precautionary Statements: Avoid exposure, do not breathe dust or vapors, avoid release to environment, wear protective gloves, clothing, eye and face protection, wash thoroughly after handling
Chemical Name: 2,3,4,7,8-Pentachlorodibenzofuran
Purity: Greater than 98% when used for analytical purposes
Impurities: Minor traces of other chlorinated dibenzofurans possible depending on source
Molecular Weight: 360.33 g/mol
Component Breakdown: Single chemical entity, no mixtures reported for pure substance
Inhalation: Remove exposed person to fresh air immediately. Provide support for breathing if any difficulty exists; seek prompt medical assistance. Avoid direct contact with contaminated clothing.
Skin Contact: Wash immediately with plenty of soap and water for at least 15 minutes. Remove and isolate contaminated clothing and shoes. Medical attention required without delay, especially if symptoms develop.
Eye Contact: Wash eyes under gentle running water for at least 15 minutes, lifting upper and lower eyelids. Medical evaluation is critical.
Ingestion: Rinse mouth; do not induce vomiting. Get medical care immediately. If person is conscious, provide water for dilution and transport to hospital.
First Aiders: Use gloves, goggles, and suitable protective equipment to avoid personal exposure.
Suitable Extinguishing Media: Dry chemical powder, carbon dioxide, or alcohol-resistant foam; avoid water jet directly on product; use water spray to cool exposed surfaces
Specific Hazards: Releases toxic fumes (hydrogen chloride, phosgene, dioxins) on combustion; fumes cause serious respiratory harm
Firefighters' Protective Equipment: Self-contained breathing apparatus, full protective suit to prevent skin contact
Advice for Firefighters: Remove containers from fire area if safe, avoid inhaling smoke, contain firefighting water to prevent run-off into drains
Personal Precautions: Restrict area access, ventilate area, use full face respiratory protection, gloves, and body covering
Environmental Precautions: Prevent product and contaminated materials from entering waterways, sewers, or soil
Spill Clean-up: Absorb with inert material (sand, earth), scoop up using non-sparking tools, seal in labeled containers for disposal
Decontamination: Wash area with detergent solution, collect washings for safe disposal, decontaminate tools and equipment used
Handling: Use containment systems, handle inside exhaust hood, keep away from food and beverages, do not eat, drink or smoke in area, avoid contact with skin or eyes, wear disposable protective suits and change gloves frequently
Storage: Store at controlled temperature away from heat, sparks, or open flame, use secure containers that prevent leakage, lock area to limit unauthorized access, segregate from acids, bases, oxidizers, and reducing agents, maintain detailed inventory and access logs
Occupational Exposure Limits: No established regulatory limits; handle under the assumption that any exposure can have serious health impact
Engineering Controls: Work in chemical fume hood, local exhaust ventilation recommended, keep closed systems where feasible
Personal Protective Equipment: Respiratory protection (PAPR or full-face mask for contaminated air), chemical-resistant gloves (nitrile, butyl rubber), splash goggles, face shield, impervious coveralls, rubber boots
Hygiene Considerations: Remove contaminated clothing, wash hands and skin thoroughly before breaks or leaving area, do not reuse disposable equipment
Appearance: Off-white to light yellow crystalline powder
Odor: Odorless or faint chemical smell
Relative Density: About 1.6 g/cm3
Melting Point: Approximately 175–185°C
Boiling Point: Decomposes before boiling
Solubility: Insoluble in water, soluble in organic solvents (benzene, hexane, acetone, toluene)
Vapor Pressure: Low, less than 1 x 10-6 mmHg at 25°C
Stability: Stable under standard laboratory conditions when protected from light and moisture
Reactivity: Avoid mixing with strong oxidizing agents, alkali metals, strong bases, and reducing agents
Chemical Stability: Stable under dry, inert conditions; prolonged exposure to heat or light increases risk of decomposition
Decomposition Products: Hydrogen chloride, dioxins, other toxic chlorinated organic compounds
Conditions to Avoid: Open flames, hot surfaces, incompatible chemicals, moisture, UV or direct sunlight
Routes of Exposure: Inhalation, skin absorption, ingestion, eye contact
Acute Effects: Severe irritation of respiratory tract, nausea, vomiting, dizziness, convulsions, systemic toxicity leading to organ damage
Chronic Effects: Bioaccumulation in fatty tissues, risk of reproductive toxicity, immunotoxicity, probable human carcinogen (based on animal data)
Symptom Onset: Immediate for acute effects, delayed for carcinogenicity or chronic poisoning
Sensitization: Risk of allergic skin reaction on repeat contact
Environmental Toxicity: Extremely toxic to aquatic organisms; causes long-term impact on aquatic environments
Persistence: Resistant to natural degradation, accumulates in sediments and biota
Bioaccumulation Potential: High, concentrates in animal tissues, especially higher in the food chain
Mobility in Soil: Low water solubility, adsorbs to soil particles
Ecotoxicity Data: Lethal to fish, amphibians, algae at very low concentrations; chronic impact on reproductive success of wildlife
Methods of Disposal: Incinerate at high temperature using approved hazardous chemical facility with scrubbing of off-gases; do not landfill untreated material
Contaminated Packaging: Treat empty containers as hazardous waste, triple rinse and deliver to licensed waste handler
Do Not: Release into drains, soil, public waste collections
Regulatory Controls: Dispose in accordance with local, regional, and national regulations governing persistent organic pollutants
UN Number: 3469
Proper Shipping Name: Organochlorine compounds, solid, toxic (includes polychlorinated dibenzofurans), n.o.s.
Transport Hazard Class: 6.1 (Toxic Substances)
Packing Group: I
Labels: Toxic, Marine Pollutant
Special Precautions: Keep away from food, feedstuffs; notify authorities in advance for large shipments; maintain shipment under constant supervision
Classification: Listed substance under Stockholm Convention for Persistent Organic Pollutants (POPs); subject to strict handling and reporting rules
US Regulations: RCRA hazardous waste, listed under TSCA, subject to SARA Title III reporting; OSHA hazardous chemical standards apply
EU Regulations: REACH candidate list for substances of very high concern (SVHC); Seveso Directive (COMAH) hazardous chemical
Other International Laws: Restricted import and use in most countries; transport requires specific documentation
Worker Protection: Employers required to provide training, exposure monitoring, and medical surveillance for those working with this compound
